Most probably - metrics tend to be focused on something advertisers like to hear, like page views (paginate your artist listings for more page views!), scroll-downs (add loads of whitespace and padding and large artist photos), video watches (play the video in the background of the page), song plays (make it hard to find the song you want, so you try 10 until you find the right one...)

Given so many metrics are either time or attention based, they probably are opposed to user experience (less time needed to achieve the task).