Oh good, so this thing hasn't come close to returning my investment, and now instead of the upgrade they promised, they want me to fork out another ~$1250 for a whole other unit to run up my hydro bills more and *hopefully* make me back the money I put into the S2 and now the new S4?!?
I believe this is where the train stops for me ... done with Bitmain.
I feel the same way. Waiting for positive news about possibly over clocking these units to 2th/s with maybe a firmware mod/volt mod.