Amazon currently sits in fourth among all US music sales and "claims just a tenth of the sales volume at its online store," the study adds. Amazon is behind Best Buy, Wal-Mart and iTunes and will need to "significantly increase its digital sales rate to surpass the higher-ranked stores" reads the study.
Amazon has seen its store grow on a couple of chief principles. It sells some songs for cheaper (89 cents) than iTunes, all tracks are DRM-free, and the store can be accessed on any modern operating system.











