So, back when iAd - the whole "popup ads baked directly into the OS that freeze your phone until you look at them" thing - when that first showed its face during the announcement of iPhone OS 4, it was pointed out that language in the developer agreement barred the collection of data by advertising agencies. This would include, say, "How many people saw my ad?" or "How long did they look at it?" or "How many people opened the page the ad links to?" or such things. You know, the sort of data collection that is absolutely necessary for it to even be possible to compensate someone for running your ads.
Well, Apple's changed the developer agreement. Now, you're allowed to do that. HOWEVER, you are only allowed to do that if you are "an independent advertising service provider whose primary business is serving mobile ads". The agreement goes on to say that "an advertising service provider owned by or affiliated with a developer or distributor of mobile devices, mobile operating systems or development environments other than Apple would not qualify as independent". Which is essentially Google, Google, and Adobe, respectively.
There are antitrust laws against saying "You can't do this if you're Google" in that sort of agreement. I have little expectation that what is essentially "You can't do this if your name has an 'oog' in the middle of it" will stand up to the inevitable lawsuit, and this certainly won't help Apple with the antitrust probes they're already facing.