Most of the negative ones or comments trying to persuade her to change it back I've see are on OF, Fansly has very few. Of those comments, they are saying stuff like: preferring the red or brown, new color every week incoming, that was quick/ Didn't take long...
You're right though, it's predominately positive comments, but knowing Mai she's going to read the negative ones and take them to heart, like in her IG story.