If i recall, at the time sub owners could designate anyone as a moderator without them having to accept the position, meaning that its very possible he was made a mod of the subreddit as a joke/troll but never actually interacted with it.
Correct. Early reddit you could add whoever you wanted as a mod to your subreddits, no invites required. This changed after a crab bucket subreddit was created and got up to several hundred mods re-adding anyone who left.
He is clearly steeped in 2000s chan culture, and jb was a big part of it at that time. It's a big part of the reason I stopped using 4chan, because it got to the point where there was too much chance of randomly coming across that shit. Reading between the lines, it's very likely that he's a fucking pedo.