It has to be noted that all these kind of companies are ponzi schemes. PERIOD. Just think about it: if any mining whatsoever would have been taking place - and actually they did have some economical return by doing that - why would they rent their equipment to other people?
Instead of cloud mining, just use your money to purchase and invest in the crypto of your choice!
Sapere aude!
RE: Best 11 Bitcoin Cloud Mining Sites in 2018