Every legal operator uses the real domain provided by the game provider, not some gibberish fake domain like you do. Only certain providers sometimes use random domains to bypass blockers and such, like Pragmatic Play does, but for example, Booming Games uses cdn.systems as its domain and Evolution uses evo-games.com. So it is possible to identify who is providing cracked slots and who isn’t.
And the RTP part just proves what I said. As an operator, you can change the RTP, which is not possible with real providers. That is only possible if the slots are cracked. This might work for illegal operators, but for any serious operator looking to get licensed, it will only cause problems.
I think game providers only provides the casino with games but the domain name must come from the casino themselves and I think I already saw a kind of domain they are talkin there. I think it is only normal, so I'm not bothered with that.
As for the slot replays, I think the providers name is mostly starring here. Right that a site can also use alternative domains to bypass restrictions or for some users to access them immediately because the main domain can be traffic. Some casino has their own original game, so they can change the RTP's on them in a legal way but licensed operators can still look for other factors and see if they are qualified or not.