In addition to all the above, Bitmain can no longer offer a profitable cloud mining service using their own ASICs, yet these guys can using the same old "hardware they bought off ebay".
[ANN] Jan 14th, 2014 - Umisoo, ANTS2, & ANTS3 Hardware Powered OffToday, at 08:05 GMT, all Hashnest Umisoo, ANTS2, & ANTS3 units were powered off, as their maintenance fee became higher than their payout. This procedure was previously outlined in this post
https://forum.bitmain.com/bbs/topics/969. At the moment, we are examining the situation to determine what further action will be taken. We will be doing our best to keep you updated with the latest information. As long as the machines are switched off, there will be no new revenue payments from these machines. Further, we will collect no maintenance fee on the Umisoo, ANTS2, and ANTS3 during this time.
Note: GH/s trading for these units will continue as normal. Users may still buy or sell mining contracts for the Umisoo, ANTS2, and ANTS3 during this time.