Spotify Users Buy 13% Less Music? Not So Says Spotify [UPDATED]

Spotify, the successful European company (and our #15 most innovative company of the year), which plans to enter the U.S. market this year, offers up free streaming of music--great for users, but it's not helping the industry, according to fresh research firm NPD Group. Consumers using free streaming music sites that let them choose any song at any time make 13% fewer purchases of digital music, NPD says.

Six million European users already take advantage of Spotify's collection of six...