Yeah, I've read that, and it's not an example of a corporation killing a decentralized network through federation, it's just a normal example of a corporation killing a decentralized network by having more money to make a better app.
XMPP did not die because Google used that protocol, it died because people preferred using Google Talk over any of the XMPP apps. That would be the case regardless of whether Google used XMPP or not.
Kiwiapple87
FaceDeer