>>4016552I don't think you know what promotion is. She's an order of magnitude more popular, so any interaction she might have with someone outside her agency would encourage her audience to check out someone unaffiliated. That is promotion. Even if they were similarly popular, it would be cross-promotion.
And as much as we might like the Nabi family, Amelia Watson was their foot in the door. There's a reason Nabi still lists her first in her Twitter bio. In the entertainment industry, you don't just become successful off of talent alone
You need some initial momentum, and being connected to Hololive via Watson was that momentum for Uto and Nabi.
And she did say nothing. For quite a while. When it started to get out of hand, and was detracting from her own streams, she shut it down by saying that there's no hard feelings, but they're not sisters. That's not "very bad," it's not malicious, it's just asking her viewers to move on because she can't and won't act on it.