diberry - 4:21 pm on Sep 21, 2012 (gmt 0)
Because the advertisers are always protected first. That's one of the tradeoffs you live with in exchange for an extremely easy-to-implement ad system that pays reliably and usually more than other ad networks.
Excellently put. Someone recently asked me why I wasn't using Adsense, since it would pay better than the other ad providers I use. This is why - there are just a lot of ways you can get banned through no fault of your own, and I *know* I'm probably not savvy enough to figure out something as complex as what the OP is dealing with, or even netmeg's bot attack. I know there's a good chance it would never happen, but I just can't face being at a point where I rely on those Adsense earnings, and then suddenly having to replace them with other advertisers.
(And FWIW, at least in some niches, there are a few ad providers who can really compete with Adsense.)