It's a common thing in programming language design and circles where some people like to form little cults of personality around their project. Curtis Yarvin did that with his Urbit project. V-Lang is another good example. I consider Elm an example as well.
They get a few "true believer" followers, give them special privileges like beta access (this case), special arcane knowledge (see Urbit), or even special standing within the community (also Urbit, although many other languages where the true believers are given authority over community spaces like discord/mailing list/irc etc.).
I don't associate in these spaces because I find the people especially toxic. Usually they are high drama because the focus isn't around technical matters but instead around the cult leader and the drama that surrounds him, defending/attacking his decisions, rationalizing his whims, and toeing the line.
Like this thread, where a large proportion is discussion about Blow as a personality rather than the technical merit of his work. He wants it that way, not so say that his work doesn't have technical merit, but that he'd rather we be talking about him.