The companies and contractors cutting ties with Nijisanji aren't doing it as a moral statement. It's not to appease fans. It's not to protest. It's because Selen was the only one that actually paid them, delivered on projects, provided art assets, etc. Nijisanji is too much of a financial risk to assist because Nijisanji might refuse to pay them and without livers to step in, there is too much risk of not getting paid.