Facebook has been in partnership discussions with various companies to fully integrate music download with the Facebook profile. Most of these deals would have resulted in the wrong user experience and I’ve done my best to stop them where they didn’t make sense. In particular, there’s no way that iTunes could enable the right experience on Facebook. Business development teams have a bias for working with the top player in a given market, especially when they don’t understand that market. Unfortunately, partnering with iTunes would not only have created the wrong user experience, it would have had disastrous consequences for the emerging digital music industry.
(via The E-mail That Initiated Spotify’s Integration Into Facebook)