How would you want to earn your money? Earning from youtube partnership would be awesome, I already have a network of channels once one becomes a partner then I can really get going.
It's against their TOS for anyone to talk about how much they make so it's not public. It's based on ad views and clicks. From what I can tell, if you get a decent following(ten thousand or so views per vid) then you can get a decent amount of money. It wouldn't pay the bills but it would allow for a decent amount of spending money.