I'm not one of them because the Normal and Hardcore characters I have are not capable of PVP playstyles.
Side bets? I could go for sidebets in a PVP when it is legal.
Maybe some experience gained per win? (But players can cheat off of those.. hmmm)
I heard the gold drops that the Goldskin effects were taken off. (Why did THAT player show off that effect?)
So yeah.. That's it. Pvp is great. But not THAT great.