That always baffled me.

Whenever I hear people complaining about anything less than 6 months ROI, I just shake my head. I mean if I made a machine that printed $100 every day, and every two weeks it printed a little less. I wouldn't part with it, for less than what I thought I could make with it for at least the next year or two.

The fact that ASIC mfg's continue to sell machines to us still amazes me. I understand that in the beginning they had to recoup startup/R&D costs, but now Bitmain is rolling in cash and Avalon ain't doing too bad either. I would have thought they would all have become like Bitfury by now and just fill their own farms.