>>1346376Fact. Kataribe debuted, streamed 3 times, and then we've heard nothing from her since. She hasn't streamed or tweeted since then. But she's still listed as an official member, unlike those who have retired/graduated, so theoretically she could just start streaming again at any time.
That's an extreme example, but there are also Niji vtubers like Yaguruma who streams like once per month and Gilzaren who doesn't even manage that.
Nijisanji has more members who probably work jobs alongside being vtubers and basically just stream from time to time. Though I think nowadays they are clamping down on that, as the recent batches of Nijis have all consisted of pretty regular streamers.