Google Ads don't give you your money until your site has produced 300 US dollars through Google Ads. Until you reach the $300 mark, it's Google's money. So while it's an OK system, it doesn't produce 'instant money'.
So there's that drawback. Not that I'm a dev with any knowledge of these things, just sayin'.
"One of the bitches actually gave birth while she was attacking, and her puppies joined in on the carnage."
--the awesomeness that is Boatmurdered.