Im running a very small podcast hosting company, and spotify is NOT a good player in this space. They are not respecting the standard in any way. As an example, instead of linking to the source url, they make their own copy and serve that instead in the app, so the hoster does not see any downloads, cannot do statistics, etc. It also add copy protection... They also do not refresh the original URL regularly or the content, so if a change was made to the file , description or image it will not show up on spotify unless you do some custom stuff (breaking other players).

So the break is already happening in this world...