In Indonesia, there is a former Thai casino dealer and owner who has quit. He explained that the casino is designed to always profit. Gamblers can profit if the casino gives someone the opportunity to win or become a bookie. In addition, online gambling and online fraud practices often have the same network. Sometimes someone does not realize that he has downloaded and accidentally gambles.
Oh, yes, now there are plenty of fake casino sites that are very difficult to distinguish from real ones. People do not even notice some distinctive details. For example, it could be another letter in the name or something else. This happens constantly and almost daily. If you visit forums dedicated specifically to casino games, there are a lot of similar stories.
Yes, the casino has a small payout ratio so that people understand that there are those who do win. It's part of the business. It's all quite simpler than it seems.