I am sure that what you are describing is not only frowned upon by the authorities and casino regulators, but it is also quite illegal for casinos to do. I doubt any legitimate casino would try to risk their entire business over some extra profit. Especially when they are being controlled and hounded by people whos sole job it is to weed out bad actors in that particular business.
Don't get me wrong, I think casinos will try to do the sneakiest, dirtiest things to gain more profit but only when they are moving in a legal area. Rigging the games in such a way is undoubtedly not legal though.
Quite right. It is very strange to me that in general one would somehow think that some casino would do this and risk its reputation (on which the whole business is built). If the casino has difficult problems with the authorities of some countries, then it is more profitable for them to simply block access to users from these countries and do business where there are no problems. Coming up with criminal schemes to "solve" problems in troubled jurisdictions is an extremely ridiculous decision.
I follow that point, why risking your reputation by controlling something like thi and not just to completely block the access and not to allow people from jurisdicted area not to play. It's more logical to do business and established your reputation without any kind of risk like this, not sure though if the sites have that kind of issue.
But from a general point of view, if you want to established good business better to work without any issue with whatever that may rise along the way while managing your business.