To keep stable income from BTC mining - one should buy new devices every month (and $/GH ratio will drop a lot in future to keep buyers, so amount of bought devices per month will grow). Does anybody want to have hundreds of devices in his room, and maintain all this stuff? Nope. Its much easier to buy mining contact -
Thats a spectacularly stupid reason to buy mining hardware... (or lease hashrate). "to keep mining income stable". Really?
Any sane person would invest in mining equipment if/when if he sees an opportunity for it to be most likely profitable, but apparently if your profitability goes out of the window, your solution is constantly doubling down ?
That will end well!
For BFL that is, they will soon sell out that datacenter.