This is the correct list, having lived through it. BBS services in the mid-1980s were the start of Razor1911, Paradox and other distro and cracker groups. I'd edit 2 to include FTP which is what BBS evolved into with secret dropsites for new releases.

IRC is 2.5 on this list. You can group that alongside the pre-web internet services, like AOL which had slightly IRC-like chat rooms dedicated to serving warez and videos in the same way (requesting a list from a chatbot, and then requesting sequential files).

Some light history here, though like all warez-related scholarship, there's a ton missing that you had to have seen to know:

https://en.wikipedia.org/wiki/Warez_scene

https://archive.org/details/b904a8eb-9c98-4bb1-bf25-3cb9d075b157/