Music is now a category on Twitch.
What was once a platform primarily for gamers has expanded into music. Feel like showing your amazing songwriting skills, or how great you shred that insane 8 string metal riff? Now's your chance to do it live and make a little cash to support your gear habit.
From https://www.musicbusinessworldwide.com, "In a year in which performing live music to audiences on real stages has been next to impossible for a lot of artists, Twitch, with its multiple millions of concurrent viewers, has become one of the key destinations for live streaming activity for musicians."