@jdp23 for your statement on XMPP that even if they didn’t bridge to the open social web, maybe they’re part of the open social web on their own: no it’s just like the actual web. There’s only one open social web just like there’s only one web - if you don’t interact with the bigger web you’re not part of it. You’re an Internet.
Same with the open social web - there’s only one and to be part of it. You have to be a part of it and natively or via a bridge interact with it.