Let's get to the point.
You want the highest daily payout per dollar invested.
Real numbers as of today (September 9th 2014):
ZenHashlet - $20.95 or 0.04277 BTC per MH/s SCRYPT - minimum $20.95
- never expires. Accepts credit cards and BTC.
- daily payout estimate - 0.00067009 minus daily fee of 0.00016672 = $0.2482 or 0.00050337 BTC
1.1769230769230767% earned per day. - Calculation: daily payout divided by purchase price.
ROI - estimated 84.96 days to break even.
HashletGenesis - $1.00 or 0.002131 BTC per GH/s SHA-256 - minimum $9.99
- never expires. Accepts credit cards and BTC.
- daily payout estimate per GH/s - 0.00002300 (multipool) minus daily fee of 0.000004262 = $0.008735 or 0.000018738 BTC.
0.8793054903801032% earned per day. - Calculation: daily payout divided by purchase price.
ROI - estimated 113.72 days to break even.
BitcoinCloudServices - $1.32 or .0027 BTC per GH/s SHA-256 - minimum purchase 50 GH/s @ $66.65 or 0.1350 BTC
- 5 year contract. Accepts BTC only.
- daily payout estimate per GH/s - 0.00001834 no fees = $0.008622
0.6792592592592592% earned per day. - Calculation: daily payout divided by purchase price.
ROI - estimated 147.21 days to break even.
PBMining - $1.43 or .0029 BTC per GH/s SHA-256 - minimum purchase 25 GH/s @ $35.79 or 0.0725618 BTC
- 5 year contract. Accepts BTC only.
- daily payout estimate per GH/s - 0.00001834 no fees = $0.008622 (only pays weekly)
0.6324137931034484% earned per day. - Calculation: daily payout divided by purchase price.
ROI - estimated 158.12 days to break even.
CEX - $1.80 or 0.003653 BTC per GH/s SHA-256 - minimum purchase as little as $0.004937 or .00001000 BTC
- never expires. Accepts BTC/Altcoin.
- daily payout estimate per GH/s - 0.00001834 minus daily fees of 0.00000611 = $0.005750 or 0.00001223 BTC (pays hourly)
Note: CEX also pays a small amount of NMC and IXC which can also be converted to GH/s or BTC and you can sell your GH/s at any time.
Note: CEX now acts as a free Altcoin wallet and lets you trade any major Altcoin - LTC, DOGE, DRK, NMC, IXC, POT, ANC, MEC, WDC, FTC.
0.3347933205584451% earned per day. - Calculation: daily payout divided by purchase price.
ROI - estimated 298.69 days to break even
Credits to: sites.google.com/site/freebitcoinsforall/