The CEO of Spotify, Daniel Ek, apologized publicly for this, and he also explained that what they did was for a purpose, and that the data collected will be used for a much improved and personalized products and services. He said that all these are for the satisfaction of each subscriber.
As he continued, he said that each data or information will be collected depending on your permission. And in case you do not want to give your info, you can just easily turn it down and choose only the features you want to maximize the Spotify experience with. But if you are not agreeable with this policy, you are free to permanently delete your account.