nostr:npub1cuscsrz6efq99ptktk26x58v4yqy9y46ytp8xw4rjjwq0wlt6znst66789 yea there were quite a few that existed before AP... Actually mastodon wasnt originally AP. When I joined we were still using ostatus I think.
nostr:npub1kpwlxpzkxfmuxjmzc2wp3rf9vjg0sgydmlhsnrgqr3maf59h86qqdxxzz4 right, i think i'm remembering some much older .org instance that i forgot the name of, and it was GNU Social, and was around before ActivityPub took off so it used OStatus
Discussion
nostr:npub1kpwlxpzkxfmuxjmzc2wp3rf9vjg0sgydmlhsnrgqr3maf59h86qqdxxzz4 i entered the stage around 2017 and it still had OStatus compatibility at that point