The way I perceive it is that if a person who is not cheating or engaging in illegal gambling activities consistently wins, the casino is highly likely to ban that person, just as they did with Dana White.
But at the end of the conversation written in the source, Dana White, stated like this.
Dana White said “It’s not that I’m banned from casinos, it’s just that they don’t want me to play there.”
As far as I know, cases like Dana White's, apply in physical casinos, the story is different if Dana White plays in an online casino, it could be that he doesn't have the opportunities that happen in the physical casino.
An incident like what happened to Dana White is exactly what happened in the James Bond film, he became a target for bandits to kill, because he won consecutive bets, yes, it is normal for the casino to forbid Dana White from betting at the casino, because the actions taken by Dana White could be detrimental to the casino owner, they anticipated this action, in my opinion this is one of the anti-loss measures for the casino.