Card counting is generally ineffective in online Blackjack due to factors like automatic shuffling, multiple decks, and the use of Random Number Generators (RNGs) that ensure each hand is independent. Many online games also feature continuous shuffling machines, which prevent players from tracking cards, and casinos monitor for unusual betting patterns to detect card counting. As a result, while card counting can work in traditional casinos, it offers little to no advantage in online Blackjack.