Thanks for coming to the Spotify Idea Exchange and for the support you've shown for this idea.
We've forwarded your feedback with the relevant team and upon reviewing our options, we don't have any immediate plans to implement this.
We do want to implement this in a bit of a different way though. A couple of weeks ago we've started offering our Open Access Feature, where the podcast creators themselves can opt-in to the program. That way, if you're currently getting private RSS links for one podcast provider rolled into Open Access, you can be sure that you'll be able to listen to them on Spotify, as long as they've opted in to the program. Currently, this is restricted to a few podcast partners, but we hope on expanding this soon. Read more about the current available partners and more about the initiative here.
In light of this, we're marking this case as closed for now. This isn't the end of the story though - we periodically revisit closed ideas to check on any developments, so we will get back to you if there're any updates. At present though, we want to make it clear that implementing this as described is not in our plans.