Question about Spotify's privacy policy? (Read Description)?

They have the right to do it, if you use their services, you agreed to it - but failed to read the warnings / agreement. You can opt out, by not using their services or connections to social media. Remove your account, and the connection to FB and they don't get the access. When you link your account to FB, they post messages on your behalf, and use your friends list to update them with what you're listening to.

FB is a true big brother tool, and users don't seem to notice or care very much. It is the very nature of Social Media. The reason it is free, is they sell / charge for the information they gather about you to advertisers. Amazon, Google and search engines do the same, using cookies and other side effects.

Your demographics are more useful when they can tie yours to others, and create groups, and market to more selective targets. What you like, they suspect that your friends may too, and try to entice them to buy, or use their services. Almost everyone on the planet is tied to everyone else in the world within 6 people that they know, or people they know - 6 degrees of separation.

If you don't agree, stop using the service, and find another that doesn't tie back to FB. Keep things isolated, not connected. The more things you connect, the more big brother learns. Big brother is the collective minds and companies of the world - not government. The internet and WWW were the key elements necessary to bring things together the worlds described in the "science fiction" stories of Huxley, Toffler, Wells, Bradbury, Orwell and others - that turned out to be more blueprints, than outlandish futuristic stories, that most thought were meant as entertainment, not a foretelling of how things are to work.

Orwell's Doublespeak is Politically Correctness ... New term for the same thing. Everything to everyone, no one should be offended.