When Spotify, the digital music company of the moment, announced this week an exclusive deal with Led Zeppelin and free access on mobile devices, it also reported impressive numbers. Its listeners have streamed 4.5 billion hours of music this year, and it has paid more than $1 billion in music royalties since its founding.
But Spotify, a private company, omitted the results that music executives, competitors and investors care about most: how many people use the service and how many pay for it.
Services like Spotify, Pandora and Apple’s new iTunes Radio have become the latest hope for the beleaguered music business. They let customers listen to vast catalogs of songs online, either free or through subscriptions for as little as $3 a month. Full story for BostonGlobe.com subscribers.