The key is that in Omaha, each player gets twice as many cards as in Texas Hold’em poker. This reduces the number of possible increases hands can have a player. The likelihood that someone in online poker folds in Omaha is very low and therefore is not bluffing on the flop in Omaha lucrative. What does that mean but for them: they shall not bluff in Omaha rather on the flop, but of course put their stronger and medium strength hands, because it is very likely that they will get called in Omaha from bad hands.
That or you can just look in their poker software. So they take distance from the bluff in Omaha flop and they look to dominate their opponents in other ways! If they adjust properly to the game, they can also live in Omaha poker with real money to earn, but without beds flop!