>>64445414It depends on how much and how bad. If it's a situation where they are in something like a group collab and it doesn't happen again or happens once a year or something, most of the time it gets forgiven pretty quickly. A vTuber's track record matters and if the collabs are rare and stay professional, their fans usually give them a longer leash.
If it happens multiple times, and/or the chuuba starts flirting with men on stream, and/or she dunks on her "toxic fanbase" afterward and calls them "incels" or goes on a rant about "How dare you try to control my behavior, I don't want your money!" etc, then you can expect their numbers to rapidly tank after the short-term "yo go gurl" Twitter tourists leave and the gachikois stop donating.
Basically, the scale and frequency of the incidents matters, as does the response to the backlash.
I personally think responses to the backlash are often far more damaging than the initial incident is. The reason people are really mad at Ririka, for example, is not because she collabed with men but because she said (paraphrasing) "lol all I have to do is run a few ASMR streams and those Unicorns will come running back!"