Yes, most of the cloud mining sites are scams but only a few websites like genesis mining, hashnet are the sites still paying to the members.
So it's better to research before investing into any cloud mining because there are many people who are going give reviews about cloud mining sites.
Those two are good.
Good is a relative term. People are satisfied and willing to leave a good review as long as they are getting paid. But the main point of importance is that this has nothing to do with the 'cloud mining' service in question being legit. As long as there is enough fresh money coming in (enough in the way that they will be able to pay out all people and still make profit), everything will run just fine. Just wait for the moment when there isn't enough fresh money coming in anymore -- they'll run or just shut down everything....