ofcourse you have to deposit money before you start mining, because in cloud mining you BUY mining power no body lets you mine for free. As far as 150 ghs goes its bonus hash you cannot use it until you deposit which is fair. There is link of video in end i made live transaction so this website is definitely paying and im getting 10% profit everyday.About scam yes almost all cloud mining are scams but why not make profits while you still can although its up to you.