a block. 3, since, cloud, mining is provided as a service there is generally some cost and this can result in lower returns for the miner. See Mining Hardware Comparison for fpga hardware specifications and statistics. 1 2, this type of cloud mining enables users to mine bitcoins or alternative cryptocurrencies without managing the hardware. Fpga Mining fpga mining is a very efficient and fast way to mine, comparable to GPU mining and drastically outperforming CPU mining.
Outsourcing the mining to places where electricity expenses are less like in the US makes sense. This made mining something of a gamble. The rate is recalculated every 2,016 blocks to a value such that the previous 2,016 blocks would have been generated in exactly one fortnight (two weeks) had everyone been mining at this difficulty. Fpgas typically consume very small amounts of power with relatively high hash ratings, making them more viable and efficient than GPU mining. But cloud mining is not without its risks and shortcomings. So, cloud, bitcoin mining helps when you are keen. See Proof of work for more information. Alternately, you can lease hashing power when you do not have a virtual or dedicated physical computer.