The post goes on to clarify exactly why Spotify is requesting each new type of data and for what it will be used. While most of the data is being used to personalize the listening experience for users, the caveat is that it does reserve the right to share data with advertisers, rights holders, and mobile networks:
But how does that compare to other music services? Wired put together a good breakdown of exactly what user data competing music services reserve the right to access via their privacy policies. The majority of the services all request similar data, although a few differ on accessing contacts and media files and sharing with third-parties, while others don’t have much disclosure regarding location tracking.