>>100602999Many factors
1. The demographic here is less "4chan users who also like vtubers" than it is "vtuber watchers who use 4chan because it's the largest vtuber discussion forum"
2. Site moderation at best is indifferent to vtubing, and at worst actively dislike it, resulting in poor, nonexistant, or at times actively hostile (getting banned for reporting ennacuck spam) moderation
3. Dedicated browncord and other individual rogue schizos that basically every thread even the smallest has to constantly deal with, many spamming on colldown as long as they can stay awake, or creating spam bots to carry the slack
4. A viable alternative which was functionally the same but with moderation was waiting in the wings.