> You post something via the Facebook "blue" app...get a notice that it's been seen by a few people, so pay a bit to get it seen by more and all of that is done via that one app....so an "in app purchse".

I just don't see how this is something other than a simplified way of buying an ad, like in the Ads Manager. Sure, there are influencers and wannabe-influencers who pay to boost their posts for clout or something, that doesn't change the fact that this has a real business application. And for that use, it seems like Apple is modifying the status quo by taking something that used to not be an IAP (buying an ad) and deciding that you can't have a new way of buying one without using the IAP system. Maybe it was actually about whether it's all in one app or not rather than the nature of the purchase. But I don't think that describes the status quo of how these rules work, wouldn't the logical extreme be that you should be able to buy Kindle books in the Amazon Shopping app?