Clearly it is worth it if the even-less popular JP guys stay around. For Lando joining Stars made no sense to begin with, compared to the rest of the guys who were basically nobodies, aside from Bettel, and would have remained as nobodies had they not. Stars may not reach the same heights as Live, but they still do get their concerts and sponsorships, which is a hell of a lot more opportunities than remaining indie.
Seems like Lando was just bandwagoning on the vtuber fad like a lot of other western streamers did and then got bored of it. Randon was what, a 2 or 3 view? He had something to gain off of it, since he joined after quitting his corpo job, but was clearly not cut out for it.
Edit:
See the above. Because in the case of Stars minus Lando and Bettel, they get opportunities as Stars they will never get as indies, even if it is not at the level of the girls.