Cloudbet has been around in the gambling industry for a very long time. I don't believe they are scamming people, it is a legit site with probably a lot of customers. They also have significant limits on their site, which is also important. And I think they also have a big budget, so they will pay out all the players who have won money on this site.
I also thing that they do not scam the people.
The problem is that people do not read terms of use before the register and they do not know the rules.
They do not know that they are violating the rules and believe that they were banned unfairly. And support does not always respond on time. That's why people are starting to worry.