Quoted from nosro:
The fact that someone like Keith Elwin could dominate a ticket dispensing Wizard of Oz would be the reason that these machines would be allowed to exist at all outside of Las Vegas. It becomes a clear demonstration that it is a game of skill versus a game of luck. Operators would celebrate the existence of people like Keith, but hope Keith never visits their arcade.
Last I checked, arcade basketball are also games of skill and I don't think they have any problem making money for operators, despite players like this:
» YouTube video
Wow on the video! He must have gathered up all the balls from the other machines in order to do that.