Each card game has a certain number of cards in its deck. This number varies depending on the game coverage.
Texas poker, for example, is played with a 52-card deck. This limitation gives players an idea of the possibilities.
However, another popular casino game, 21, has unlimited cards.
Because if played with a limited card, players will have a lot of information about the odds and whether they make money depends on mathematical calculations beyond luck.
This will upset the casino in the long run.
21 games still counting cards. I guess that's forbidden. But prohibiting things that are hard to detect is not enough criteria for sanctions.
Casinos deal with this problem, making bundles unlimited. When playing with unlimited decks, the counts do not mean much.
I mentioned Yugioh Deck Size above. Good games.