But that's all besides the point because we are apparently banned at btcmine, and also at deepbit, bitcoinpool, and possibly slush. In all four cases it appears to have been automatic rather than intentional. Considering how much workload and DoS some of the pools have been struggling with, it may be understandable if their scripts see 20GH/s worth of requests as another DoS attack and block it. As has been predicted, Multipool is being undone by its own success .