There's no need to dig around in the source. AdBlock Plus is setting certain ad providers on its whitelist. In theory, the decision of who is whitelisted should be made by the community. But as a German blogger recently found out, Adblock plus owners and investors have connections to some AdProviders, and those are favored, while others are still blocked. The article in question: http://www.mobilegeeks.de/adblock-plus-undercover-einblicke-...
