Something big is happening, as Reddit seems to have purged literally every NSFW sub they know. Reason is always "unmoderated" despite some of the banned subreddits being fully moderated.
Edit: seems to have been a bug in automation (thanks @lefty7283@lemmy.world):
https://old.reddit.com/r/ModSupport/comments/1ii67mt/_/mb3fewv
It's still a good reminder on how quickly a community (or communities) thousands of people enjoy and in some cases rely upon can disappear.
Erowid is used by researchers still AFAIK. Notably on MDMA research (they teamed up with MAPS).
https://www.erowid.org/references/refs.php?C=MDMA%2F
Here's one using it from last year: https://pubmed.ncbi.nlm.nih.gov/39712538/