This can be done by casinos and they will not always want us to keep winning because that might comes as a lose to them.
There are many persons who are always looking for a better casinos a new casinos where they can play bets that is why we just need to be at alert to to go and play on a wrong site.
If casino noticed that you do have consistent winnings they can look for a way to ban your account or reduce the amount you can gamble with.
Of course, it can be done by the casino to limit our account or ban our account. that is why some gamblers have multiple accounts in one casino. somehow they are not detected. but such practices are no longer a secret in the world of online gambling.
Casinos need more money coming into their platform. and gamblers want to win more from the casino. Of course, casinos don't want to lose players who have deposited a lot of their money. but they also definitely take into account players who have consistent wins.