Coolness. Sony is the last of the major labels to finally offer non-DRMed MP3 tracks for sale at Amazon. That’s spiffy both because it means, well, music available without PC- and fair-use-crippling DRM, but it sets Amazon up as a serious competitor to Apple’s iTunes store.
The trade-off: Apple’s music has DRM in it, but it’s all 99-cents per track; Amazon’s music is DRM-free, but is offered at variable prices based on what the music labels want. (That price variability is almost certainly why the labels have hopped on the Amazon bandwagon, both because it lets them charge what they want and to pressure Apple to do the same).
Competition. Non-crippleware music. It’s all good — and I say that as someone who never buys tracks online.
(via Doyce)