My take is that it isn't banned at all.
It's just not acknowledged because everyone is watching their branch self-destruct.
I do not watch Niji's regularly, but their viewer numbers for the newest gens are kinda low.
CCV may not be a deciding factor, i mean they could have a whale/oil baron as a subscriber who donates a lot, but you can't ignore that Advent fully mogged them on debut numbers and subscribers. Advent still has to form a community, and their numbers are not set in stone yet, but they seem on track to outperform Niji and even council.
So imagine being a new hire for niji, or even a talent that has doubts about extending the contract, seeing Advent debut and some lower rounds vtuber has the same numbers as you and she just started.
that has to take the windsvtggs out of you.