I've written an article / guide on how Fountain publishes podcast payment metadata using nostr - https://primal.net/merryoscar/open-podcast-payments-with-bitcoin-and-nostr

I know not everyone's sold on nostr - but this approach is working today and allows podcast payments to display in other nostr clients (see example in the article) - there's no reason we can't have the same interop between podcast apps.

I know @ChadF@podcastindex.social and @ericpp@podcastindex.social are experimenting which is great to see.

I'm also working on a JS library with sample code - will share soon.