I've been listening to a podcast about online casino scam and they said outright scam (rogue casino) is getting less frequent these days. Nowadays, it's more about soft scam when the casino trick users without they realize. For example, registration bonus, or any type bonus with complicated requirement. Pending withdrawal so that impatient user will play and got busted (instead of withdrawing the money), etc.
I've tasted this soft scam and yeah, I don't trust the casino after that incident.
It's good we have plenty of them to choose from. Indeed this "soft scam", as you call it, happens all the time on various platforms, especially on the newly appeared ones, and it's annoying. I remember playing poker several hours per day, for like 2-3 weeks in a row, earning dust in free rolls, but still my balance was around $80 eventually. When I tried to withdraw it appeared that it was never their intention to give away the money. I was lucky because I didn't deposit, so it was kind of a "soft scam" for me, but still I wasn't happy about the whole thing, and left the site for good. Later the site vanished, and I actually don't think they made a lot of money. They were just wasting time, theirs and ours. But at least, we, players, were having fun playing poker.