Where did you guys get this idea? Back then, reddit had a small whitelist of subs they specifically chosen to display on the frontpage. /r/atheism, /r/news, etc. Basically, the default ones you'd be subscribed to when you created an account.

There weren't any NSFW ones on that list, and it sure didn't include the controversial ones you guys are pointing to. Maybe if you went to /all; but that's definitely not the frontpage/homepage, and even then you'd have to specifically enable NSFW for those to show up.

By the time the frontpage started including popular subs, those subs had long since been expunged from the website.

The term is CSAM not CASM.

Nobody here is defending Reddit’s choice to use a poor front page algorithm that allowed for surfacing obscene, fringe or even illegal content over a decade ago.