It is common knowledge that if you win at South Point, you don't get a mailer.
If you continue to play and lose, you will get a mailer. The mailers are loss dependent.
Lose a lot, get a mailer. Win or lose a little you don't get anything but the money you won.
South Point de-carded many players even though they were losing a lot!
Harrahs Lake Tahoe has cut off offers to many Southern Nevada players. Everyone who plays the 3x/5x jacks or better machines during promotions. Or the $1 progressive at Harveys. Doesn't matter that you are losing a LOT. You are still cut off as they lowered the theorectical on the games. So you may be losing $40,000 for the quarter, but the theo says you are only losing $500. So you are no mailed since you are not losing enough.
Latest is Tuscany. Cut off bounce back free play in the middle of the month, sent out mailers, but the players were told they are invalid. Referenced their "style" of play was not acceptable. There are NO decent video poker games in Tuscany over 99.1%. Most are under 99%.
Casinos can do whatever they want and don't really need to give you a reason. Part of the gambling risk.
It does make you feel discriminated against when you are the one cut off. But of course that is because you ARE being discriminated against.
I still think it is NOT FAIR. Especially since I am a big loser at the casinos that no mail me. Of course no one said gambling is a fair proposition.