That's actually a pretty good idea. Considering the aim of the The Voice is to get a recording contract, counting how many songs an artist actually sells would be a good indicator of how they sell if signed.
Plus, adding money to the mix means your votes really will count. You wouldn't download a garbage song just because the singer looked hot. Or would you?
via http://mashable.com/2011/06/07/itunes-the-voice/
