Streamers can unlock more VIP badges by getting more viewers to chat during streams. Specifically, getting 10/15/20/25/50/100/200 unique chatters in a stream will unlock 20/30/40/50/80/100 additional VIP badges.
What is a VIP pass?
Very Important Person / Guest (VIP) allows the bearer limited access both before and after the performance to specific rooms within the venue, such as the green room. Such passes are usually allocated to close friends of the performer and promoter.