The NPD Group determined this ranking based on units sold and not on revenues. The firm counted every 12 tracks purchased online as being the equivalent of an album bought on a physical CD. The success of the iTunes store relies heavily on Apple's iPod line-up.
Back in April, the company announced that it had sold 100 million iPods. Due to DRM restrictions, music bought from the iTunes music store (unless DRM-free at a premium rate) can only be played back on an iPod, making it the only legitimate, fully authorized resource for iPod owners to get major label music online.
Source:
Yahoo (AP)
Written by: James Delahunty @ 31 Jul 2007 11:41