Me too. The list of his recordings (not necessarily releases) in the"New Desor"-- Duke Ellington's Story on Records-- suggests that most of the concerts he gave in the last decade of his life was recorded by someone.
Then you're right: he probably did make a nice piece of change from the record. IIRC Russ Freeman made enough money to retire after Mariah Carey recorded her version of The Wind. (The retirement part isn't mentioned but here's a good story about it: https://jazzresearch.com/russ-freeman-the-wind/.)
Just came back from a Kronos Quartet concert at which they played "Kiss Yo' Ass Goodbye" credited to Sun Ra, Terry Riley and Sara Miyamoto. According to the program notes it "utilizes Sun Ra's Track 'Nuclear War' as source material." It begins to really kick ass when they sample the drumming and chanting from the original.
My mistake. I should have said (according to my discography) it's Taxi War DAnce that's really Willow Weep for Me. But I better wait till I hear it to confirm.
Despite the title she gave the article she never gives any total sales figures. There have been several articles pointing out that the DOJ never said that 50% of books published sell less than 12 copies a year. They asked a hypothetical question.
I'm not familiar with her, but IIRC (and I often don't) she has some fans here who might be interest in this review:
https://thebluemoment.com/2024/04/26/matana-roberts-at-the-roundhouse/