[One Radical Dude]

Originally Posted by TheLH

You might not know it, but that commercial's on there probably thanks to Family Guy.

Due to it's huge success of reruns on [adult swim], and it's revival thanks to it, Cartoon Network made a deal with Fox that [adult swim] would premiere new Family Guy episodes first, then Fox itself later. I'm guessing the Cheese ad is a result of this deal, a thank you gift from Fox by airing ads promoting CN and it's programs.

Either that, or it could be just your cable/satelite operator adding the ads over the channel's own. I've heard of this before with ads for Nick programs on CN (abeit with the Nick logo removed) and vice versa.

It may be the doing of cable/satellite providers, not necessarily the doing of the networks themselves.