I think a lot of poker rooms and probably casinos coddle poachers.
These are often their top earners.
Rakeback used to be a mud pie of poaching, not sure if that’s still the case.
Offering higher rakeback to a player and asking him to delete cookies so he would show as a new player was commom practice, not sure if it still is.
The programs looked the other way and allowed the increased rakeback because often the poached player came from a different network and was added to the room as new player. If this poacher, who brought players over from other properties, poached a few from within the network it was ignored since the poacher was such a “good” affiliate.
Eventually the poker room would paint itself into a corner since the rakeback ended up so massive after a good player had been poached x times, that there was little profit left.
So one by one the poker rooms released various rules regarding rakeback.
Make sure you read these rules carefully! They determine whether your players are safe or not.
Not that there aren’t still a lot of “under the table” deals.