Wouldn't limiting them just kill the enthusiasm of the user? Sounds like a method to lose customers imo, especially if it wasn't in the ToS or something (e.g. after x amount won you can only bet y amount). Business-wise wise though I can see why, I mean they're basically losing money off of a single person. Pretty sure no business would want to see that and since the casino always has the right to ban someone (in their ToS usually) anytime as long as they have a valid reason (which they can just create), they can always kick someone out whenever they want to.

Whatever the actual case may be, as long as the casino is losing due to players, they'd probably do whatever to stop that, even if you're just one dude winning a bit of what they're earning lol.