Top questions

Xpubs is a Cryptocurrency cloud mining service that offers an easy and safe way to purchase hashpower without having to deal with complex hardware and software setup. We offer hosted cryptocurrency mining services and a variety of mining related solutions to small and large scale customers. The combination of our algorithmic trading framework, mining infrastructure, and proprietary mining farm-management software, Genesis Hive, quickly made us an industry leader.

Our team of mining experts with extensive knowledge of the digital currency sector specializes in building the most efficient and reliable mining facilities. Xpubs is also the founding partner of Logos Fund, the first ever Bitcoin Mining Fund, which targets professional investors looking to gain access to Bitcoin’s and various other digital assets’ potential.

Our service was founded by the end of 2013 and with now over 2.000.000 users we are the world‘s leading multi-algorithm cloud mining service.

It’s quick and very easy! As soon as we receive your payment your contract will be added to your profile, and you can immediately start mining. Depending on the blockchain algorithm you select and the associated mining service agreement you enter into, you can either mine native cryptocurrencies directly or allocate your hashpower to other cryptocurrencies (marked with AUTO), and even choose a specific allocation for them. For example: 60% LTC, 20% BTC and 20% DOGE. The first mining output is released after 48 hours, and then a daily mining output will follow.

Remark: Every day of mining will be processed and sent to your account in the following 24 hours after the mining day is over.

Please refer to section “When do I get my mining output?” for more details.

Besides the fact that we ourselves mine with the very same hardware that we offer to our clients, our capital is limited. We believe that Bitcoin and Altcoin mining is one of the best ways to receive Cryptocurrencies, however, we do not want to “put all our eggs in one basket”.

It is always possible that mining hardware crashes, slows down or completely breaks. In all these cases, our algorithms ensure that other miners are allocated to the relevant pools to fully compensate for possible hashpower loss. This way our clients will not lose a second of mining time.

For security reasons, we do not disclose the exact location of our mining farms. As of April 2015, we are operating several mining farms that are located in Europe, America and Asia. Electricity cost and availability of cooling are important, but not the only criteria. See our Datacenters page for more information.

We do not publish a list of pools we are using. Our main criteria for a good pool are: reliability, fee structure and reject rate. Going forward we will solo-mine a few coins (and pass the fee savings to our users!).

Our internal policy is: “be a good crypto citizen”. This means, that we will at least use two different pools (in some cases we use up to four) for each coin. This is to preserve the decentralized nature of the crypto networks! If we become aware that a pool is getting close to 50% share, we will switch away from it and use a backup instead.

On the first glance one might think that buying miner X is slightly cheaper than hosted mining. However, there are a number of “hidden” costs related to purchasing and maintaining a miner that change the economics significantly:

  • Shipping costs: few merchants will cover this, but in most cases they will charge you extra.
  • Customs dues / VAT: if it is an international delivery you will likely have to pay customs dues and VAT; generally this has a huge impact on the total cost of your mining equipment.
  • Delivery time: when you pay for your device you have to wait until the miner is packaged and shipped; if it is held up in the customs this can take weeks. And during that time you cannot mine at all (“opportunity costs”). You have to wait and hope. And if the merchant has a stock shortage; it is you who has to wait. With Xpubs you pay and get your hashpower immediately online. No delays!
  • Costs for additional equipment: when buying miners from larger retailers you often have to buy additional equipment like an extra PSU that matches the electricity specs for your country, control units and specific shelves to store them efficiently. This adds up significantly to the overall price for hashpower.
  • Setting the system up: when the device finally arrived you have to assemble and configure it. Beginners often underestimate the amount of work and technical knowledge that is needed to bring the device up and optimize its settings. People that used the first ASICs spend days and weeks on it. In monetary terms this costs you twice: (i) your time and (ii) lost mining opportunity.
  • Maintenance: hardware failures, outages and crashes could lead to downtimes between seconds and weeks. If your unit breaks you have to return it and start from scratch (by the way: check the guarantee time of your miner; it is often less than a year). With Xpubs you have a guaranteed uptime of 100%: in case one of your units fails another unit will be switched over and start mining for you the very same second.
  • Electricity: having the machines at home not only brings heat and noise, but also an increase of your electricity bill; an important factor that many underestimate.

Please do not get us wrong: we do not want to discourage anyone from mining at home! We are often asked about prices and realized that many users do not know about all the hidden costs. If you compare the true costs, you will notice that our prices are very competitive. We want to provide you the best possible mining experience, so that you can focus on mining your favorite coins (and we take care of the rest).

You are able to mine Bitcoin and various altcoins directly via our mining allocation page*. The availability of cryptocurrencies you can mine depends on the contract you have chosen.

You must allocate your hashpower in order to determine the cryptocurrency received for your mining output. If no allocation has been made, the mining output will default to the following for the given blockchain algorithm:

  • SHA-256 contract - Bitcoin
  • X11 contract - Dash
  • Ethash contract - Ethereum
  • CryptoNight contract - Monero/Monero Classic
  • Scrypt - Litecoin
  • Equihash - Zcash

(*) “Xpubs Advanced Allocation” (special feature):
It allows you to get mining outputs in many different coins even if they are not mined directly by a certain algorithm. For example, you can get mining outputs in BTC while mining with an X11 algorithm! That is possible by mining the DASH coin directly, which is then automatically swapped to BTC by our algorithmic framework. The Allocation function is designed for customers to receive delivery of their mining results in their preferred cryptocurrency. We call it “mining BTC the smart way”. The same technique is also used to get mining results in LTC with a SHA-256 contract, etc.

Xpubs allows its clients to mine different types of coins at the same time. You decide which coins you prefer and you can allocate hashpower accordingly.

Each mining algorithm is set up with a default delivery cryptocurrency. The Xpubs Advanced Auto-Allocation (in short “AUTO”) will apply to all cryptocurrencies which cannot be mined directly. In the user interface go to “Mining Allocation” and choose the hashpower allocation that is best for you. When you are done press “save allocation”.

Remember that the cryptocurrencies marked with (AUTO) are not directly mined, as mentioned in the “What coins can I mine?” section of this Customer Service page.

In order to get the mining output, please ensure to add your wallet address(es) to your Xpubs profile. Find out more details about how to add your wallet(s) in the next section.

Most cryptocurrency protocols utilize different proof-of-work mining algorithms to enforce their blockchain rules. In the table below, you can see what type of architecture we deploy for mining the available cryptocurrencies. Please be aware that blockchain developers may make changes to features and specifications of the algorithm over time, which can result in the elimination of support for and/or a different use of chips utilized by Xpubs. You can find more information about that in the Terms of Service before purchase.

Which mining algorithms & architecture types are used for mining?

Additional information can also be found in this blog post: https://xpubs.io/blog

Since third-party calculators are a popular way of estimating mining performance, we have set up a Performance estimation tutorial on how to make your own calculations, along with the general explanation about potential mining scenarios.

When evaluating the benefits, please keep in mind that mining, and using our service, is subject to a daily maintenance fee (if applicable to your mining plan) which must be deducted from the daily mining rewards.

The results of cryptocurrency mining highly depend on the price and the network difficulties of the given cryptocurrencies that you are mining. Neither of those can be predicted, so each customer must make an independent decision about the benefits of cryptocurrency mining and, in doing so, should consider the risks and their own circumstance when choosing whether to mine.

Some of our products have a maintenance fee attached.

The maintenance fee covers all costs related to mining including, inter alia:

  • electricity cost
  • cooling
  • maintenance work
  • hosting services

The fee is fixed in USD but deducted from the daily mining rewards in the natively mined coin on a daily basis. You will find the maintenance fee details of your chosen contract in the Terms of Service before the purchase.

We currently accept the following payment methods:

  • credit/debit card: Visa, Mastercard
  • cryptocurrencies: Bitcoin, Litecoin, Dogecoin, Dash, Zcash, Bitcoin Cash

Credit card purchase limits per user account:

  • Successful purchases per day: 5
  • Successful purchases per week: 10
  • Minimum purchase amount: 10.00 USD
  • Maximum transaction limit: 6,000 USD
  • Daily purchase limit: 25,000 USD
  • Monthly purchase limit: 25,000 USD

Cryptocurrency purchase limits per user account:

  • Successful purchases per day: unlimited
  • Successful purchases per week: unlimited
  • Daily purchase limit: unlimited
  • Monthly purchase limit: unlimited

NOTE: In some rare cases, some issuing banks may charge additional fees from customers who purchase Bitcoin or cloud mining services via credit/debit card. They call it ‘cash advance’. If considered, please contact your bank beforehand for further information.

In the menu “My Account” select “Settings” and then “Wallets”. Here you can set wallet addresses for each type of coin.

Important: Remember that you have to add a wallet for each coin selected in the “Mining Allocation” section

Faq - Wallet

A mining day usually starts at 00:00 UTC and ends at 23:59:59 UTC so your miners will mine for you 24 hours a day and act exactly according to your settings (see “mining allocation”).

We have a lot of scripts running, and there are numerous checkups that are being done, which even include checking some parts of the process manually, to maximize mining outputs for our customers.

Therefore, as a result of that, the time between two outputs can (and will) occasionally be longer than 24 hours. On the other hand, it can also be shorter than 24 hours. The fact is, you will receive a mining output for each mining day. Please ensure that you provide a wallet address for each coin you mine.

Keep in mind that all of our mining outputs are daily and automatic, but the actual transfer to your wallet takes place when the balance reaches the minimum amount required for transfer.

Also, when you order via debit/credit card, your mining outputs will be held for 30+2 days, as stated in the Terms of Service. We do so because of fraud and security reasons. Once the month passes, the full amount will be released to the “Activity > My Activity” section (and to the wallet, if the threshold has been reached), and from then on you will receive a daily output.

In the meantime, you can see your accumulated mining outputs on your account under “Activity - My pending balance of mining outputs (paid with credit card)”.

For any further questions, feel free to contact us via our web form or the “Contact Customer Service” section on your Xpubs account.

Keep in mind that the quality and promptness of our response also depends on the request you have submitted. Our topic drop down menu has several options, and if the wrong form is used, it can delay the resolution of the ticket.

Mining outputs are generated daily, but you will receive your outputs only once they have accumulated to a certain quantity. These minimum mining outputs are set in order to avoid that customers pay excessive fees for receiving small amounts in their wallets. Please visit the “My Account - Settings - Wallets” section of your account for further details.

When you purchase an Ether mining contract, you buy a share of a GPU (“graphics processing unit“) to mine Ethereum. The hashing algorithm used to mine Ether is called Ethash (or Dagger-Hashimoto).

Ethash requires the so called DAG file in order to perform the calculations. This file grows over time, which means that more operations for each hashing operation need to be performed. This means that the effective hashrate decreases a little each time the DAG file grows.

This has to be considered when comparing the theoretical output of your hashpower. Online calculators do not take this into account.

Also, please keep in mind that some of our products have a maintenance fee attached. Please refer to the pricing page for further information: https://www.xpubs.io/marketplace

Please refer to our Affiliate FAQ in https://www.xpubs.io/referral. You will find very detailed information about the program there.

Please visit our blog to learn more about us:
http://xpubs.io/blog

Customer service is our highest priority! Making decisions is not only about having a good feeling but also about understanding the business concept in detail. Therefore, if you need any help, our agents are available to assist you via chat.

Keep in mind that account-related questions, which require a detailed check, need to be submitted via ticket from the “Contact Customer Service” section on your Xpubs account or our web form (at the bottom of this page). Since the quality and promptness of our response also depends on the request you have submitted, please make sure to choose the right service topic from our drop-down menu. If the wrong one is selected, it can delay the resolution of the ticket.

We are looking forward to hearing from you.

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