Spotify trying to lock-in users just after IPO (2018)

It’s come to our attention that the service associated with your Spotify developer account, Stamp, is in violation of Spotify’s Developer Terms of Use. Stamp is in violation of Spotify’s Developer Terms, which prohibit developers from integrating Spotify Content (including metadata) with third-party services, or building products or services that promote competition with the Spotify Service, among other things. Stamp’s use of the Spotify logo in its app and on its website also misleadingly suggests Spotify’s endorsement of Stamp’s services.

Source: freeyourmusic.com