I think talking about 'entryist parasites' and 'urbit insiders shielding themselves from people wanting in', is on its face pretty obviously cringeworthy.
Like, is that a problem that Urbit has, hordes of people at the door wanting to jump in, like some coveted nightclub?
William Gibson called this very aptly anti-marketing in his Blue Ant trilogy, and like you point out in your first sentence, it's nothing but a manipulative tactic by people who want to inflate the value of what they're selling by making it artificially scarce and exotic.
Yarvin's goal was to preempt this issue before it might become a problem.
Don't get mad at me for explaining this - I'm not even convinced any of this makes sense. I'm just articulating Yarvin's arguments.
I'm not "selling" anything. I don't have any stake in Urbit.