Sorry if I'm out of line, but this seems like an awful risky way to get a few % profit for your investment. No?
After the .666BTC/TH is paid back, they own the hardware and u don't get jack.
So from t I gather, they rent you the miner until they pay your principal back, plus a minuscule amount, IF the pool is lucky...??
Even at 100TH this is like 2.xx% after almost 4months.
The 'minuscule amount' depends on how long the pool takes to find a block. If it has bad luck, then you will earn more.