That is normal for the house to give some wins to some gamblers, big and small.
Because if there are no gamblers that wins from them, most of the gamblers will flee from them and they're going to stop visiting them.
So, any strategy that works, it will work shortly but not in the long run.
Exactly, that is indeed the casino strategy where they make winning something that will continue to attract gamblers to come back, and when they have come, especially with a high obsession with winning, that's where the casino will make gamblers lose and usually the amount of loss is much greater than the amount of winnings that the gamblers have previously obtained.
That's the greatness of the casino, meaning it can be concluded that the casino makes winning something that will turn the feelings and thoughts of gamblers upside down, but in the end most of the gamblers are still trapped, and this is the reason why we as gamblers should not put excessive hope in winning, just think of winning as a bonus, on the other hand, there is a strategy but it will only work occasionally and I quite agree with your last statement.
That is because if someone finds out a strategy that works in the long run. The casino will find out based on their findings in our accounts.
That gives them the idea on how it goes to the most of us because they're there to make some money and business as usual to let people win some but lose more.