
In a word, yes. Casinos are private businesses just like any other, and can decide who they choose to do business with. In practice, such a scenario would be very rare, and would tend to lean on scenarios that are related to players finding advantages against the house, like card counting. Even in those scenarios, casinos would be more likely to wave them off a specific game over a complete ban, although it’s certainly not unheard of.
Slot machines, it would be even more rare, but scenarios where a slot machine could be expected to pay out more in the short term do exist, and players who solely take advantage of those situations could be banned by a casino. We’ve heard of a few examples of this, however rare it may be, but there are more aggressive casinos who will ban players for consistently winning.
A more common, and less extreme, action, however, is just to have comps revoked for winning too much too often. A casino will often note that a player has won enough cash to comp themselves, as it were, so the casino shouldn’t be expected to provide comps until or unless some losses show up on the tally.
Casinos tend to base offers off a percentage of expected loss, so when that loss consistently isn’t showing up, casinos may overrule that formula. Of course, the pendulum can swing both ways – some casinos will rebate some losses when the loss is far ahead of what would be normally expected in the long term on a game, as long as the losses are big enough to justify it to keep a player happy.
But in the end, casinos can, and occasionally do, ban a player for winning too often. Oftentimes this can be for specific scenarios, like card counting. But if you’re just winning a jackpot here and there, or leaving ahead periodically, we don’t think you should worry too much – bans are generally kept for the most specific circumstances.
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