I agree with you, I actually like that idea of not just trying to compete but just being a central point for podcasts. Since iTunes is device-based while Soundcloud and Spotify are account-based its nice to give users options.

So if I was on your podcast profile I could listen on this site or choose my preffered medium. If things get taken down on one platform you always have another and your audience can migrate.

We can also tell a user how many listeners choose to use which service or the native service and pull in subscriber numbers and download numbers per platform so it gives the creator a better sense of how far their podcast reaches. Which is great for selling to advertisers