If anyone has a serious beef with the music labels, it’s Michael Robertson. Robertson took MP3.com public in 1999, only to later to pay tens of millions of dollars to labels that sued the startup, claiming storing songs on servers infringed their copyrights. Fast forward to today: A new wave of music startups like Spotify, MOG and Rdio stream songs from servers with the labels’ blessings. It might all be above board now, but the labels are still bleeding the digital-music services dry.