User blog comment:Yarrghman/Rufio, the Insidious Croupier/@comment-7481207-20130413120920/@comment-6353331-20130413121408

It's supposed to be a luck and skill based kit. His Q has persistent bonuses, so his stats are boosted- especially in the late game. All of his abilities (excluding his passive) give him gold when he wins them, and generally, he can win more than he spends to play. Plus, very late game, he'll have nothing else to buy (than blue/red/oracles) so that's when his passive can really shine.