Ok fair enough, my mistake. I just don't understand why they would go with 130 considering power would play such an important role in their ROI. That just lead me to believe they are using the same fab and the chips are easier to acquire. I mean, if you're going to make your own, why 130? Cheap?
Cheaper, shorter time to manufacture, so there is way less risk than investing in 65nm technology. Also, electricity is not expensive in China.
With the money they can make from the 130nm, they can then migrate to more advance process.
Have to admit that is the China advantage, Cheap Labor, Cheap Power, Plenty of resources/hardware, work like no tomorrow 24/7, and 130nm is cheap and fast. Probably all these guys already have the same schematics, design, BOM and same factory clunking them out. Important is Speed and shortest time frame. His NRE and other start up costs is very minimal so he is making a killing at 0.48btc per gh/s. He should have recover his investments before he reach 50T, so the extra 50T is profit all the way.