That list proves what most people knew already. They were strong in the 60s and 70s, began dying in the 80s, was nearly dead, if not dead already, in the 90s, and by the 2000s, not relevant. We're already up to 2010. I doubt there are many people who care anymore, and as people have pointed out, anyone who cared enough to want the Beatles in digital format already has their CDs on their iPods.
I mostly listen to old music (from 20-40 years ago). I care.