I don’t think there were any bans (or very few), but a lot of the “core” of this site at the time chose to move over to Taiwanese and stopped posting here as often - and then never made the move to the new forumosa format either, because that does present something of a (very flimsy, easily stepped over) wall to returning.
Mind you, in the years since they’ve also stopped posting there as often. I assume that’s a mix of Facebook, parenthood for some, leaving Taiwan, and just doing different things with life.
Complicating things is that I’m never sure who goes by what name now. Maybe the people I thought had gone are actually still around, just under a different name. Until recently I thought wafflestop was BelgianPie’s new ID. Then BelgianPie reappeared. Every so often jesus oops I mean mad_masala will post something that makes me think, “Dr. McCoy, is that you?” And the cleverer trolls who show up with odd stories have a whiff of jimi presley to them.