[millerc]

Besides the reasons discussed elsewhere, I see many reasons:

- The device in itself disrupts the mining hardware market. Should they mine by themselves, others would take notice and make their own ASIC hardware. They're in a much better place if they position themselves as the standard supplier for mining hardware, at least in the long run.

- I would see this ROI collapse as soon as this catches on. The market will be flooded with bitcoins, their individual value will diminish, and the bounty will likely decrease compounding the decrease. History says that the return will eventually (and soon) decrease to match the cost. Assuming the hardware is fairly priced (which it seems, given the current low volume), I would say the money value of those 122.83 bitcoins will come down to the same money value you would get out of $14k invested elsewhere.

- Whoever is operating the rig for user 67117, he's doing a hell of a marketing job for Avalon, just by being there. Is there any other offer in the world that can deliver on the promise "Give me $14k and you get $3k a day"? Sounds like a short-term proposition, but there's surely a good amount of money to make while it lasts.

[negrit]

Note, it's not 14k but 'only' 1.4k

[JStrange]

It's actually closer to $15k, assuming he needed 11 ASICs to reach 800GH/s.

They are about $1.4k/unit.