He points out that although the policy asks for permission to use information including photos, mobile device location, voice controls, and contacts, Spotify will seek express permission before accessing any data and will only use it to improve the Spotify experience.
Ek gives specific examples of how data might be used, for example on location information, "We will never gather or use the location of your mobile device without your explicit permission. We would use it to help personalize recommendations or to keep you up to date about music trending in your area. And if you choose to share location information but later change your mind, you will always have the ability to stop sharing."
Does this reassure you about what Spotify is up to? Do let us know.