This is a good reminder if it sounds too good to be true, it probably is

This a news article about a cloud mining scam in which hash-lets were sold to buyers and return for payouts. The only problem was there were no mining operations going on. This Ponzi scheme sounds a lot like Genesis Mining contracts for cloud mining.
https://www.cryptocoinsnews.com/sec-wants-gaw-miners-and-zenminer-to-pay-12-million-settlement/