>>33714698here, let me break this down for you
vtubers are entertainers
most vtuber enjoyers are heterosexual males
most women are attention whores who cannot interact with a male without trying to flirt, however bad they may be at it
for a heterosexual male, watching a girl try to flirt with a male badly is only entertaining when it's (a) directed at (You), or (b) from someone you're not interested in trying to flirt with a guy you can consider to be (You)r bro; otherwise, it's not entertaining
so we can identify some reliable demographic characteristics of the potential audience for male/female chuuba collabs. female fans of female vtubers are in. queer men are in. straight male fans of brotubers are in and fully support axel's quest for nodoka snoo-snoo.
note that heterosexual males who are fans of the female vtuber in the hypothetical collab, are not identifiable as a viable market segment by this method, and these people make up the lion's share of female vtubers' support, whether measured in hours watched or monies given.