Don't be naive, people. #Facebook is only interested in collecting more data and to connect that data to profiles to feed to the ad machinery. If #ActivityPub can be used for that, they will give it a try. That's it. That's all. It's still Facebook.
#kbin is an absolute mess, it's impossible to find anything. It's a constant stream of... things. I'll check back in half a year when everything has settled.