Large changes in bet-size are an obvious indicator, so card counters must work in teams. One is the counter, the other gambler is the whale who bets large when the count is favorable.
Unfortunately, the casino has a simple defense: table limits. The whale must sit at the high-roller table, the counter must sit elsewhere. Count cards as much as you like, but you'll never make money at a modern casino ("you" being the aggregate of all card counters, not an individual).
Large changes in bet-size are an obvious indicator, so card counters must work in teams. One is the counter, the other gambler is the whale who bets large when the count is favorable.
Unfortunately, the casino has a simple defense: table limits. The whale must sit at the high-roller table, the counter must sit elsewhere. Count cards as much as you like, but you'll never make money at a modern casino ("you" being the aggregate of all card counters, not an individual).