Contracts (One-year contracts):
SHA-256: 1.5$ for 10 GH/s -> 150$ 1TH/s -> 1950$ 13TH/s (Yet 1950$ is only 1-year rental whereas your rig will stay yours forever)
Fees: 0.0035 USD per every 10 GH/s (currently approx. 30% of daily earnings) ->Hashflare
Profit: 3.79$-1.5$(Hardware)-1.2775$(Maintenance)=1.01$/year per 10 GH/s -> 1313$/year per 13 TH/s
SHA-256 (real S9 Miner): 2000$ 13TH/s (cf. Hashflare 1950$)
Fees: 0.003$ USD per every 10 GH/s (currently approx. 25% of daily earnings) ->S9 mining rig(1400w with 0.1$ Cost pet KW/h)
Profit: 3.79$-1.53$(Hardware)-1.095$(Maintenance)=1.16$/year per 10 GH/s -> 1508$/year per 13 TH/s (cf. Hashflare 1313$)
But keep in mind that you can sell your hardware at any time as it stays yours forever (not 1-Year Contract)
Profit w/o hardware: 3.79$-1.095$(Maintenance)=2.7$/year per 10 GH/s -> 3510$/year per 13 TH/s
*As you pay only for the hardware, you have to pay for the maintenance fees in both cases.
Conclusion: If you decide to buy your own hardware it will will stay yours forever. Nevertheless, keep in mind that you need a storage place for your mining rig and have to deal with the noise, so it should not be turned on 24/7 in your apartment.
Scrypt: 7.5$ for 1 MH/s -> 3750$ for 500 MH/s
Fees: 0.01$ per every 1 MH/s (currently approx. 62% of daily earnings) ->(cf. real miner only 15%)
Profit: 9.54$-7.5$(Hardware)-5$(Maintenance)=-2.96$/year per 1 MH/s -> -1480$/year per 500 MH/s)
Scrypt(real L3+ Miner): 5$ for 1 MH/s -> 2500$ for 500 MH/s
Fees: 0.0038$ per every 1 MH/s (currently approx. 15% of daily earnings) ->L3+ mining rig (800w with 0.1$ Cost pet KW/h)
Profit: 9.54$-5$(Hardware)-1.387$(Maintenance)=3.153$/year per 1 MH/s -> 1576$/year per 500 MH/s
But keep in mind that you can sell your hardware at any time as it stays yours forever (not 1-Year Contract)
Profit w/o hardware: 9.54$-1.387$(Maintenance)=8.153$/year per 1 MH/s -> 4076.5$/year per 500 MH/s
Conclusion: At this point I strongly advise not to buy any Scrypt contracts on Hashflare since you will end up losing money by doing so unless LTC suddenly skyrockets.
As other Hashflare contracts (Zero-fee contracts) are not profitable in my opinion, I will only briefly summarize the results:
ETHASH: 2.2$ for 100 KH/s -> 220$ for 10 MH/s -> yields approx. 153$/year (0.51ETH), thus you will lose 67$ unless ETH goes magically up
X11: 3.2$ for 1 MH/s -> 320$ for 100 MH/s -> yields approx. 60$/year (0.2 DASH), thus you will lose 260$ unless DASH goes magically up
EQUIHASH: 2$ for 1 H/s -> 200$ for 100 H/s -> yields approx. 127$/year (0.54 ZEC), thus you will lose 73$ unless ZEC goes magically up
To sum it up, of course you can try your luck and hope that one of the altcoins will skyrocket to the moon and then you will make some money by joining these contracts. Nevertheless, you could also simply buy the following altcoin and make some money by simply holding the altcoin currency on an exchange. So as far as I am concerned, the only reasonable contract in Hashflare at the moment is the SHA-256 Contract.
Eobot (founded 2013):
Eobot offers several contracts like Cloud Folding, SETI, Scrypt etc. Though they are not very profitable and thus I dont want to discuss them in detail.
The only reasonable contract would be the SHA-256 5-Year Rental: 6.8$ for 10 GH/s (cf. Hashflare only 1.5$) but also keep in mind that it is a 5 Year Contract and not one year contract(cf. 1.5$*5=7.5$ for 5-Year Hashflare SHA-256).
SHA-256 5-Year Rental: 6.8$ for 10 GH/s
Fees: 0.0021$ per every 10 GH/s (cf. Hashflare 0.0035$)
Profit: 3.79$-(6.8$/5=1.36$)-0.77$(Maintenance)=1.66$/year per 10 GH/s -> 2158$/year per 13 TH/s (cf. Hashflare 1313$)
Hashnest(founded 2013):
Hashnest belongs to BitMain(world's foremost producer of ASIC bitcoin mining hardware) and offers you different cloud mining possibilities. What is interesting about this site is the fact that you can buy other people´s cloud mining power vice versa (can sell it back at any time) on the Market. It is very beginner-friendly since they have the possibility to start with as little as 8000 Satoshi and buy 1 GH/s. Yet keep in mind that the withdrawal fee is 20.000 Satoshi, so you should invest at least 40.000 Satoshi in order to make some money after the withdrawal fees are deducted.
Contracts (lifetime):
AntL3+: 7$ for 1 MH/s -> 3500$ for 500 MH/s (cf. L3+ mining rig discussed above)
Fees: 0.0027$ USD per every 1 MH/s (currently approx. 10% of daily earnings)
Profit: 9.57$-7$(Hardware)-0.98$(Maintenance)=1.59$/year per 1MH/s -> 795$/year per 500 MH/s (cf. Hashflare - 1480$)
But keep in mind that you can sell your hardware at any time and it is a lifetime contract so it stays yours forever (no 1-Year Contract)
Profit w/o hardware: 9.57$-0.98$(Maintenance)=8.59$/year per 1MH/s -> 4295$/year per 500 MH/s
AntS9: 3.51$ for 10 GH/s -> 351$ 1TH/s -> 4563$ 13TH/s (cf. Hashflare 1950$)
Fees: 0.0019$ USD per every 10 GH/s (currently approx. 18.5% of daily earnings)
Profit: 3.79$-3.51$(Hardware)-0.69$(Maintenance)=-0.4$/year per 10 GH/s -> -533$/year per 13 TH/s
But keep in mind that you can sell your hardware at any time and it is a lifetime contract so it stays yours forever (no 1-Year Contract)
Profit w/o hardware: 3.79$-0.69$(Maintenance)=3.1$/year per 10 GH/s -> 4300 $/year per 13 TH/s (cf. Hashflare 1313$)
AntS7: 2.45$ for 10 GH/s -> 245$ 1TH/s -> 3185$ 13TH/s (cf. Hashflare 1950$)
Fees: 0.0041$ USD per every 10 GH/s (currently approx. 40% of daily earnings)
Profit: 3.79$-2.45$(Hardware)-1.49$(Maintenance)=-0.15$/year per 10 GH/s -> -195$/year per 13 TH/s
But keep in mind that you can sell your hardware at any time and it is a lifetime contract so it stays yours forever
Profit w/o hardware: 3.79$-1.49$(Maintenance)=2.3$/year per 10 GH/s -> 2990$/year per 13 TH/s
Genesis Mining: (founded 2014; discussing only small contracts, bigger contracts cheeper)
BTC (Lifetime contract): 1.5$ for 10 GH/s -> 30$ for 200 GH/s -> 150$ for 1TH/s -> 1950$ for 13 TH/s
Fees: 0.0028$ per every 10 GH/s (currently approx. 29% of daily earnings)
Profit: 3.79$-1.5$(Hardware)-1.02$(Maintenance)=1.27$/year per 10 GH/s -> 1651$/year per 13 TH/s (cf. Hashflare 1313$)
But keep in mind that it is a lifetime contract so the hardware stays yours as long as profitable
Profit w/o hardware: 3.79$-1.02$(Maintenance)=2.77$/year per 10 GH/s -> 3601$/year per 13 TH/s
Contracts (2 years w/o fees)
ETH: 30$ for 1 MH/s -> 300$ for 10 MH/s
Profit: 15.31$*2-30$(Hardware)= 0.62$/2 years per 1 MH/s -> 6.2$/2 years per 10 MH/s
LTC: 14$ for 1 MH/s -> 28$ for 2 MH/s -> 140$ for 10 MH/s
Profit: 9.57$*2-14$(Hardware)= 5.14$/2 years per 1 MH/s -> 51.4$/2 years per 10 MH/s
ZCASH: 48$ for 25H/s
Profit: 31.78$*2-48$(Hardware)= 13.56$/2 years per 25H/s
MONERO: 50$ for 60H/s
Profit: 32.58$*2-50$(Hardware)= 15.16$/2 years per 60H/s
DASH: 6$ for 1 MH/s -> 30$ for 5 MH/s -> 60$ for 10 MH/s
Profit: 0.59$*2-6$(Hardware)= -4.82$/2 years per 1 MH/s -> -48.2$/2 years per 10 MH/s
Best contracts at the moment:
Genesis Mining: SHA-256-> 1651$/year per 13 TH/s
Hashflare: SHA-256 -> 1313$/year per 13 TH/s
Eobot: SHA-256 -> 2158$/year per 13 TH/s (*buying a 5yr contract, thus the outcome may be quite unpredictable!)
Hashnest: L3+ -> 795$/year per 500 MH/s
This review should not be taken as financial advice, merely an analysis of current options. Since cryptocurrencies are highly volatile, cloud mining as well as mining in general involve certain risks e.g. difficulty increase, price drops etc.
If you have any additional information or questions feel free to comment and I will try to answer as soon as possible
