A serious answer: After her initial termination, she probably wanted to get back into a steady gig as soon as possible, and Kson was entirely willing to help since she was already likely to be knee deep in signing with VShojo. For their part, and to put it nicer than
>>65498013, VShojo was also probably wanting to ride off the potential hype and discussion that would have come with grabbing her as well, and to jumpstart their footprint in Japan. As many other people will say, though, it would seem that having two of the most anticipated VTubers in the country wouldn't necessarily be enough.
I think that if VShojo had more native JP streamers or a better network, she wouldn't have been so quick to take back Michael Cat. In the end, it almost seems as if being Nazuna was more therapeutic for her, as if it were less of a new path and more of a safety net. I will say that the fact that she gets to keep Nazuna is interesting; I wonder if she will ever bring her back in the future.