Google doesn't have a phone support for Adwords either. That's another story, though. Google wouldn't have Adwords customers were it not for AdSense, so I think your point fails in that sense. Google "traps" your money, whether make legally or not, and you never see it again unless you manage to appeal "correctly." Furthermore, there is no proof whatsoever that Google returns all of that money to advertisers. I've never seen a trace of evidence they don't just mark that as profit.