It is negligible. I am an experienced player, and I can't see how the limited value of this in a real game compensates for the incredible downside of being caught cheating.
Making money at (cash game, not tournament) poker doesn't have much to do with your cards. To make money you have to convince another player with a second-best hand to put money in the pot. In that sense it's all about the other players' cards.
And in order to get a "huge payoff" your opponents must hold cards that justify calling a huge bet. But almost none of the second-best hands in these decks are anywhere near strong enough to justify committing any significant amount of money to the pot.
Things get more interesting if in fact a deck can be found that gives multiple players "big" hands. But that is a lot harder, and kind of subjective. For instance, would you call a pot-sized raise on the river holding the 10 of spades with four lower spades on the board? I know I wouldn't, even though a flush is a "big" hand.
I guess ultimately it comes down to the fact that poker is a mostly situational game. And one that is played out over the course of many hands. Knowing that you will definitely win one hand during a session where you may see 200 hands doesn't really do you much good.
That said, it is a cool party trick.
P.S. In a game with experienced players, acting meekly all the way and then betting strongly at the end is a sure-fire way to get all but the top 5 or so possible hands to fold.