I also had a bad experience a few months ago with a cloud mining. But they are a total scam site. Never again I fall for their trap. Initially thought that they are legit, however, it turns out that I'm wrong. I'm not saying that they are all scam, but some are only there to really get people's money. So beware.
I would probably go a bit further than you and assert that actually most of these supposed cloud mining sites are scams. In fact, a large majority of Bitcoin investing sites are ponzis and scams. At this point, I highly doubt that a legitimate cloud mining service for Bitcoin is even worth it. Mining Bitcoin I feel is starting to hit a point where it is not as profitable as mining altcoins. We'll see if this changes in the future.