Bitcoin(or sha-256) contract for 1 YEAR:
Price: 2.4$ / 10GHS - 0.0035$ maintenance fee / day
Profit: 0.00000199BTC / day (with fee)
0.00919$ / day (with fee)
ROI (Return of investment): 262 days
Bitcoin(or sha-256) contract for LIFETIME:
Price: 1.5$ / 10GHS - 0.0028$ maintenance fee / day
Profit: 0.00000215BTC / day (with fee)
0.00989$ / day (with fee)
ROI (Return of investment): 152 days
This calculations do not include changes with the BTC price or difficulty!