SongShift Team (also: MacRumors):
The Spotify Developer Platform Team reached out and informed us that we would need to remove a transfer from their service to a competing music service or have our API access revoked due to a breach of TOS.
Spotify only wants you to use the API to import, not to export. The Mixlib app is also affected (via Olivier Simard-Casanova).
Even if you put aside the fact that this type of API restriction is bad for customers, you think that Spotify will have an eye on the bigger picture of not undermining the argument of fairness.
Spotify hates how Apple manages its own ecosystem, but it has no interest in letting customers migrate metadata in any way that could make it more convenient to leave Spotify. It is, of course, their decision to make, but for a company that claims to support consumer freedom, it has just made a hypocritical decision designed to reduce the freedom of its own customers.
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