Probably very little if any. Most of his other posts that mention promising substances (e.g. Zembrin and other nootropics) like this one[0] don't even include links and if they do I believe they are usually stripped out but I didn't find one with a link easily to confirm. I'm guessing he just included it as there are multiple different brands for this one.

0. https://astralcodexten.substack.com/p/nootropics-survey-2020...

There's no referral link in this post, he's not profiting from this and he's written about many different treatments.

Both communities define themselves by their opposition to mainstream establishments that find them destructive.

Grifters gonna grift.

Well, the point was that he (or at least the community he is in) is actively disrespected by some people as well, so it's a bit more pointed than just "not known about".

Mentioning this only for completeness' sake. I think he's good, on net. But somewhat adjacent to some more dubious and distasteful stuff.

I heard he's been known to wear white after labor day.

Yeah, that's not it.

Well, he is trustworthy on psychiatry even if he’s a member of a religion that worships nonexistent AIs and Bayes’ theorem.

But his main posting hobby is that he wants to be friends with weird internet right-wing intellectuals and that you should too. So every time I glance at the comments there someone wants to give their opinions on exactly who is genetically less intelligent than the commenter.