Scammers are also evolving as well. And I haven't seen any trusted cloud mining except for Genesis Mining, but I also heard lot of members crying scam. Personally, I don't have investment on them so I can't tell if them are scam or not. However, there are a lot of cloud mining site popping around. You need to look at the end of the site, what are their offers and what they can provide. But I wouldn't put my interest on them though. Would rather buy and hold than invest on that kind of site because the chance of getting a good ROI is really small now. And why are you interested though? Its really hard to spot them now because they are really evolving so my only advise is to stay away.