Ads and Tracking are two different things. Just because you don't see ads related to the tracked data in spotify does not mean that information is not used by the third party elsewhere.
If pay spotify and you listen to metallica, you might not get ads on spotify, but you might get a link to Metallica merchandise on another website.
If pay spotify and you listen to metallica, you might not get ads on spotify, but you might get a link to Metallica merchandise on another website.