In pool, it's 100000% ability, not income. If someone can run out the set of 9 ball, or the game of straight pool, he's a pro. (Or if he used to be able to do that before he got really old). That's it.
i disagree. i've been on the receiving end of both and neither of them would even call themselves pros. one drives a forklift and the other one slings drugs. a strong regional player isn't a pro player.
fargorate level or tournament performance makes more sense