I may not have reached 100% ROI yet but I've gotten paid almost half of what I've put in so far on Hashflare.io And since they let me re-invest my earnings my hashrate keeps growing. And the SHA-256 and Scrypt contracts are lifetime as long as the hardware still earns.

I'm not going to say it's not a risk but I'm not going to make untrue statements and say there's no profit in it. You put work into it you'll get something out of it. 100% ROI takes patience.


To put it into perspective I've put $98 USD into my Hashflare.io account and let it reinvest to build up hashrate and I've earned 0.01778436 BTC back so far. That's $51.86 in the 3 months that I've been mining for. Again like I said, not 100% ROI yet but it's almost halfway there already. So take that however you will.