I've added a suggestion to the podcast:contentLink idea that @nathan is proposing. It’s the ability to select a recommended podcast app, so that podcasters can recommend the app they would prefer you listen on.
Particularly, this might be interesting for @adam (who is doing something similar in his podcast), but also might generate rather a lovely “recommended apps” data view for @dave to produce one day.
https://github.com/Podcastindex-org/podcast-namespace/discussions/589#discussioncomment-8130357