>>90053541> What sponsorsThat varies. Suisei's "Shout in crisis" was sponsored by JOYSOUND and Bushiroad, for example.
Multiple girls, both JP and EN (i.e, from top of my head, Miko, IRyS, Suisei and more) have said that Cover doesn’t fund sololives and it costs more than what members can pay by themselves. If a girl wants a sololive, she has to be able to convince sponsors to pay (Cover does help with negotiating and organizing).
With that said, the venue's size depends on how much sponsors are willing to fund. If sponsors agree to give them a total of $1M, for example, Cover isn’t going to get a $2M per session venue (numbers arbitrarily chosen for demonstration purpose only)