@clacke I have not seen any more posts by app developers, but I did see someone else claim this morning (US time) that nearly all known # client apps are now threatened with expulsion from Google Play over the ability to access unacceptable "user generated content (UGC)".

Someone else implied that Google does not understand federated networks. And, as Google is a huge company, it is very likely that most of the company does not. But some portion of Google likely remembers exploring Diaspora in order to clone it (sans federation) as GPlus.