The wording, in the book, is, in fact:
The younger generation celebrates the mainstreaming of the movement, failing to realize: when veganism ceases to be a freak show, it ceases to be a show at all.
I have also described this as a kind of "game show", luring in contestants just to humiliate them on camera.
There has been less and less interest in veganism for many years now, with this genre being "the sole surviving genre" of (formerly diverse, fractious and fragmentary) vegan edutainment. I cannot say that this sort of thing is popular, but there's a lot of it.
Here is "The Militant Vegan", trying to succeed playing the same game by the same rules:
https://www.youtube.com/@themilitantvegan/videos
Both of these examples happen to be women making money out of their physical appearance via internet pornography. This is a recurrent pattern (as I've observed and discussed many times) with important political implications.