I think what he meant by the part where they are saying "take it Doyle" and their cards are hitting the muck is that if he's in the hand, he's defending the hand. Which is much different than any two cards over and over and over.

Sometimes it's hard to bet at a pot for him. But the image he wants everyone at the table to know, is that people either call them, or fold. Because if they play back at Doyle, he's going to shove all in, and let the cards fall as they may. That's why he takes down so many little pots, because people realize they need very strong hands in order to confront with Doyle.

Moreover. He doesn't care about any of the money he makes off of his original stake. Remember if he buys in for 100, and picks up 50 by being aggressive, he's willing to risk all 50 of that on a drawbecause he considers it a "free roll". Ie, use the money you build up by picking up pots to gamble with.