vpFREE2 has 17 unique pay tables
for the Jacks or Better (aka: JoB) video poker game.
Of these, vpFREE2 considers 7 games "good" or "playable",
under typical circumstances, with a return of at least 99%, including 9/6/90 JoB and JoB (FP).
At least those 7 games may appear in the casino pages.
Other, lower returning variants may also appear if they are "progressive" or are the best games in the casino.
Unfortunately, there are no commonly found variations of JoB with a return of at least 100%.
