A little more on comparisons
Uston made real money playing blackjack but wanted the fame.
Though I do not know Dave, I think it is obvious he wants fame in that he wants an acting career. Also, I think he made a decision that blackjack today is difficult to make a full time job and those who can must do it under the radar, which is definately against his personality.
Now if he could make a big score in a tournament he sees that as a big payday that might transfer itself into other big paydays in the acting field. In the meantime he has devoloped a character that will continue to get invites to these televised tournaments because he has entertainment value to the producers.
ihate17