Here's a breakdown of Nijisanji earnings (and not by a fucking dramatuber):
https://youtu.be/u2fGW5Lt9jwWatch the whole video, it's probably the most informative video about vtuber earnings out there.
Nijisanji also sells merch on 2 different websites:
https://shop.nijisanji.jp/https://nijisanji.booth.pm/I don't know if they get different cuts depending on the website. Also, apparently it's possible to produce merch without Anycolor being involved:
https://youtu.be/GKygxzLUZSE?t=82But it's also unclear whether the cut is different. I would assume that if merch was produced without Anycolor's help and they bother promoting it in the first place, the cut must be more than 2%. Bu if it's 2% even for self-produced merch, that would be the epitome of black company.