if you think logically, it is almost impossible to constantly win money from the casino in an honest way.
Most likely, such people will also be banned from the casino. The reason may be that their method of permanent winnings is unknown to the security service.
But I'm sure we cannot decode this part of casino. A casino's policy on consistently winning gambler is always hidden. If they believe they can make money out of a gambler then they will simply allow them to continue regardless of their short-term consistent winning. Because, houses will try in all possible methods to make them to spend/risk all their money before they will be leaving the house. So, in beginning they will not mind about continuous winning.