@tchambers @dave @johnspurlock You will find some people who have taken databases of the Apple and Spotify charts - you could chat with Rephonic or Podgagement as two different people. However, the Apple chart is trending (not based on consumption), while Spotify skews younger and isn't representative of the industry as a whole; so not ideal. It's the best data that there is on a weekly basis, though.
Podscribe have their own data, which is a hybrid of their own data and estimates.
https://podnews.net/press-release/edison-research-us-ranker-q324 is research based (Q-on-Q), and shows that the top 50 really doesn't change that much from quarter to quarter anyway.