Mr. Ek's concept of RPU (revenue per user) is spot on. If the music industry hopes to maintain any sort of positive relationship with their customers, they must maximize the lifetime value of fans rather than squeezing "as much as possible out of every single transaction."<p>Overall, its great that a company in Spotify's position is attempting to be so open. They're in a very crowded and high risk space--if they can embrace full disclosure, any business can.