Another criterion for deciding how to play a hand is the size of the pot. As the pot grows larger and larger, it becomes less and less important to disguise your hand because good players are not likely to fold any more than bad players are. Nor will good players try to bluff as much when you show weakness, because they too recognize that the pot is so big there is almost no chance you will fold.
So when the pot has become large, you usually no longer have to think about using deception. With weak players, with a large pot, and with large early bets, you need not be so concerned about disguising your hand. A corollary is that the more players in the pot, the less you gain by disguising your hand. You cost yourself too much when you do.
You won’t be able to make everybody fold when you bet with a weak hand, and you cost yourself too many bets when you miss a raise with a strong hand. What’s more, when you let many opponents in cheaply, you increase the chances of being outdrawn. Heads-up situations require disguising your hand more than do multi-way pots.