Pomu would have probably been worse internally. The holo reaction likely would have been the same, but I think both Niji talents and non-chink fans would have reacted even worse than they did with Selen. Pomu was social and loved by everyone, but that was more contained to Nijisanji and related VTuber sphere, where Selen was more of a loner within Niji than compared to outside of it. Pomu is also less bombastic and, for lack of a better word, rebellious. Selen had a small history of having spats with management. If they tried to say Pomu was breaking rules, I think people things would have been about as bad, if not worse internally.
Like, to give an example of how fucking unaware of her connections they are, Doki has connections that are one step away from large normie people like XQC and OTK, and has direct connections with OfflineTV. That isn't counting the corporate video game connections she has formed, like have been mentioned.
They were already working with her directly as a corpo, anyway, so it makes sense. That's how she was actually able to get her Apex trophies/goodies and they didn't end up lining Riku's yacht.