Quoted By:
IRL idol fans (women) put value on showing their support as a movement. They want a synchronized output of emojis in chat, or generalized statements of adoration similar to how someone would shout out something in a crowd.
Vtuber fans are more conversational, and prefer humor, wit, and full sentences. This provides threads for the vtuber to pull from to make conversation, and creates a positive feedback loop of semi-entertainment.
Chuubas with a predominance of idol fans have these idol fans bully the rest into conformity, and end up with a dead chat, in which they struggle more in entertaining. See Vox and Gura.
Chuubas with chuuba fans have an easier time bonding and making conversation, which leads to easy entertainment and mutual fulfillment of desires. See the Dragon Sisters.