I am fairly certain that Dr. Hipp has discussed changes in SQLite that were desired by Microsoft for integration into Windows, which came to pass via a foundation membership.
I believe that this was mentioned in the video below (I am not able to verify for now):
I believe that this was mentioned in the video below (I am not able to verify for now):
https://m.youtube.com/watch?v=Jib2AmRb_rk
It would be interesting to see what is required for an organization to negotiate non-trivial changes in SQLite.