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Performers commonly have multiple gigs and everyone has a personal life. "I'm disappointed we didn't get the streams we were told to expect" is a reasonable response. One you could comment on or withdraw monetary support.
Going off on tirades about how she needs to be taught lessons, focus on only Hololive, or suffer, etc. are not reasonable. It sucks that there will be some gaps this season but they are for a good cause: her happiness. And at the end of the day, that's what should be her priority. Same for all of you, if you stop feeling happiness with her then it's best to take a leave. For how long is entirely up to you.