Quite honestly........ I think it's because these guys are GOOD and they play a lot. They take the same bad beats as everyone else, but they put themselves in a position to be able to absorb the blow if and when it inevitably happens... That, and because of the high number of tourneys they enter, bad luck knocks them out of some, but they are still albe to make it to the top of the Leader Board.
That's my guess. If you want the real answer, ask one of them