I was the founder of r/TIHI in a past life and u/spez removed all of us moderators because we weren‘t opening the sub as part of our protest.

I them requested them to take down the subs title picture and logo which I created and they didn‘t even bother.

No, but a lot of them are apologists for tech bros.

They probably don‘t want to loose the incel people in their audience

I think locally only, LibreOffice is a fork of OpenOffice.

There was a German social network a few years ago that did exactly that (before Facebook was available in German)

They had SchülerVZ for kids/teens, then they had StudiVZ for university students and finally they had MeinVZ for adults. The problem was, that they weren’t interconnected at all apart from the option to move your account to the next platform. So if you were just starting to study but you still had friends that were in school, you could’t keep in touch with them.