By the way if any gambler is so lucky that he is wining a lot of bets and games, so instead of gambling at one casino, he can gamble at multiple casino and avoid being coming in the eyes of the gambling site owners that his winning ratio is high.
Gamblers does not see that way, they believe that they are lucky playing on a certain casino rather than a certain game, so they will not take their business somewhere else. Limiting is actually normal, but it's only for those who are betting a lot of money, but for bets like $100 to $500 and then the casino will limit your because you are winning, that pretty much say that they just have a limited bankroll and therefore it's hard to trust them with big money.
However, these things are already beyond our control as the casino are the ones operating the business, all we can do is just to accept it but should not resort to breaking the rules, otherwise instead of winning, we might face some trouble and that our funds will be stuck.