>>72526601They do some of their lives on a sort of real stage that they superimpose their talents onto in an AR fashion. This is intended to be their key product differentiator against Hololive, I suppose. Here, enjoy this example: 
https://www.youtube.com/watch?v=e_Ht29q2oQwThere's no live audience for these for obvious reasons (because there's nothing on that stage in real life)