In return for some sort of consideration and a pledge to only provide "acceptable" advertising, Wladmir will unblock your ads by default in AdBlock Plus:
> We have agreements with some websites and advertisers that only advertising matching our criteria will be used, their ads will be unblocked then. We hope to grow our list significantly over time.
Given that selling advertisements runs entirely contrary to the purpose of "Adblock", and that Wladimir's incentives are now inversely aligned with the user's incentives, I imagine we're going to see the same descent into increasingly obtrusive advertising that you almost always see once an organization heads down this path.