There was a major transparency ask from both writers and other creative community members as part of demands during the recent SAG-AFTRA and WGA strikes, perhaps publishing the data was part of the settlement in those disputes.
Now writers (and actors, and anyone else) can use this information to better negotiate their worth with studios, rather than it being 1-sided.
https://www.wgacontract2023.org/the-campaign/what-we-won
> Streaming data transparency: Companies agree to provide the Guild the total number of hours streamed, both domestically and internationally, of self-produced high budget streaming programs (e.g., a Netflix original series). Aggregated information can be shared.