There are currently ad libraries you link into your app, and I really have no idea what's in those libraries and what kind of stuff they send home. Which is the crux of the problem, really, and one of the things Apple is trying to address - we should know where we send the data and how it's being used, but individual developers are not powerful enough to affect change from ad provider. Apple is.

So anyway, since I don't know what these apps collect, I can't be certain if thy will be banned in short term. Obviously once they clean up their act they will be admitted, but the transition period may be messy, that's all I'm saying.

The intersection of ads with the new rules only has to do with location-targeting. Apple had unofficially discouraged it before, saying your app couldn't use Core Location "primarily" to serve targeted ads, and they've now strengthened that language and put it in the dev agreement (3.3.9).

There's no reason to think the Deck or FusionAds or AdMob are going away in their current incarnations.

Not true, agreement forbids using user data in ways not related to the primary function of the app and it also forbids passing device data to third parties.

I'm fairly sure moblcix and admob libraries collect device ID which falls under "device data".