listennotes.com provides a nice index of podcasts, down to episodes.

Suggestion: Consider claiming ownership, and updating it with at least Spotify & Google Podcast links (they're parsing the Apple feed). 

https://www.listennotes.com/podcasts/the-nonlinear-library-the-nonlinear-fund-xuqI3sgU5DY/
Podcast audience nationality estimation might hold some interest. I'm not sure of their methods or certainty range. https://www.listennotes.com/podcasts/the-nonlinear-library-the-nonlinear-fund-xuqI3sgU5DY/#audience Amazing, 5791 Nonlinear Library episodes published in the last two years.

I would love to see an index linking to initial text posts and to podcast link(s)!
As explanation, I listen to podcasts while commuting, and often numerous episodes of Nonlinear Library (NL) because they are so short. I sometimes want to engage further, by re-reading them, saving them in a reading manager, checking the author's other work, or reading comments (or adding my own). It would be helpful to have somewhere that links to text posts.
If I remember correctly, NL made an intentional choice not to link from podcast episode descriptions to EA/LW/AF, in hopes of avoiding a deluge of engagement with posts, or communities as a whole, that do not uphold conversational and engagement norms that we so prize them for.

Should, or could, we request read-only links to posts? 

 might support sharing these posts more broadly beyond these communities, while minimizing the risk of unwelcome engagement (and supporting disclaimers to serve as an introduction to the community—"these posts are not endorsed," or "this is a forum").