I started this for free a few days ago https://bitminer.io/129772
the Earning Rate:
0.0000004 BTC/min
Daily Rate:
0.0006 BTC/day

last night I paid 0.01btc this has made the
Earning Rate:
0.0000008 BTC/min
Daily Rate:
0.0012 BTC/day

its made 0.00213024 BTC so far
the minimum withdrawal is 0.005 btc
I'll keep you all posted :)