Earlier quoted context omitted.
Just like HN grew around the writing of Paul Graham, the "rationalist community" grew around the writings of Eliezer Yudkowsky. Similar to how Paul Graham no longer participates on HN, Eliezer rarely participates on http://lesswrong.com anymore, and the benevolent dictator for life of lesswrong.com is someone other than Eliezer. Eliezer's career has always been centered around AI. At first Eliezer was wholly optimist…
A great example of superficially smart people creating echo chambers which then turn sour, but they can't escape. There's a very good reason that, "Buying your own press" is a cliched pejorative, and this is an extreme end of that. More generally it's just a depressing example of how rationalism in the LW sense has become a sort of cult-of-cults, with the same old existential dread packaged in a new "rational" form.…
I've seen the explanation that AI pessimism helped Eliezer attract donations, but that does not work because his biggest donor when he started going public with his pessimism (2003 through 2006) was Peter Theil, who responded to his turn to pessimism by refusing to continue to donate (except for donations earmarked for studying the societal effects of AI, which is not the object of Eliezer's pessimism and not something Eliezer particularly wanted to study).
I suspect that most of the accusations to the effect that MIRI or Less Wrong is a cult are lazy ad-hominems by people who have a personal interest in the AI industry or an ideological attachment to technological progress.