>>38162107
From my experience (might not apply to corporate vtubers) but streamers are in a bunch of discords for single time events, friend groups, subfriend groups, cliques, and even things like trading pokemon among each other. Odds are that most non-corporate and some corporate vtubers are also in similar message groups, just within the vtubing sphere, likely they all know of eachother if not are in a shared server somewhere.