thx for confirming it but to be frank I am not happy about your findings because players could stay away from those popular card games

You're welcome! It's natural for any cryptographic mechanism to show weaknesses over time. They (almost never) get stronger. Eventually, they are replaced with modern versions, which I think will happen here as well.
If I were a card player, I would rather know that an exploit exists than not know and be silently cheated out of my coins.
I fully agree with you that a player needs to know if any exploit exists and decide himself to play at those casinos or not