It is a good deal, because you will just lose 10%

NOT!!! This is not a deal - this is pure SCAM!!!
To have good deal - both parties should be happy with their profit! genesis mining, from the very beginning, obviously knew that they will scam everybody who invest. Those people should go into the prison instead of Bitcoin Conferences explaining how "profitable" is their cloud mining and thus catching new customers .....
Actually, the organizer of those conferences becomes their accessories and also are guilty for this SCAM!!!