The main features of the service KoulWay.com
Start of the project: 09/29/2017.
1) Give a bonus for registering 1 GH / s ($ 1).
2) You can mine BitCoin, LiteCoin and DogeCoin.
3) Profitability from 2% per day. If you buy a lot of power, then give bonuses.
4) The minimum payout amount is about $ 1.
Opinion about KoulWay
Interesting enough service – it has a beautiful unique design and good profitability. As I wrote above, the yield is fixed at 2% per day, but if you buy a lot of capacities, they give a small bonus, due to which the profitability can increase slightly, up to 2.3% per day.
The bonuses are as follows: 
Also, the minimum withdrawal here is quite small about $ 1 in any currency. I liked the service as a whole and I invested $ 71 to still get a 10% power bonus – as a result, almost $ 80 with bonus powers turned out, I hope the project will work longer.