What relays were you on? I have never seen CP on nostr. Did you start off following the crypto spammer mentioned or that was just what caused you to find nostr? I'd be curious how you built your initial follow list, as that and the relays you were on is the source of what you see. Kind of like if you go to weird ass websites you'll see that content, but nostr itself doesn't expose anything to a user, it's only a network for content read/write.

I did not keep detailed notes, but there were a couple Gists and a couple blogs that listed relays and stuff to follow. I'm perfectly willing to accept that there was bad stuff in thoses lists, but I don't really care about the mechanisms behind it. Easier just to move on.