https://techcrunch.com/2023/06/15/twitch-partner-plus/

Twitch announced a new creator tier on Thursday that would restore a more favorable subscription revenue split to streamers who qualify, with some strings attached.

Last September, Twitch announced plans to strip some streamers of the 70/30 revenue share they once enjoyed. Twitch streamers grandfathered into the premium arrangement would still be able to keep 70% of the first $100,000 earned on the platform, but after that the share would revert to the default 50/50 share. Those changes were set to go into effect this month, in June 2023, hence the new announcement.