I get why people find them interesting, because the barrier is low and they feel more “community based” than normal casinos. But that’s also the problem. If there’s no proper license, no real complaints process, and no independent oversight, then “provably fair” only goes so far.
For me the biggest red flag is not even the RTP, it’s what happens when someone wins big. A licensed casino can still behave badly, sure, but with these Discord/Roblox/game casinos you often have almost no leverage if they freeze, ban, or just disappear.