iTunes brings back b-sides with Digital 45s

iTunes recently revived an old marketing tactic:
The vinyl 45 rpm record once ruled jukeboxes and helped bring artists into the hands of true music fans … iTunes is bringing this concept into a new age with D45s—two great tracks at an equally great price.
In other words, top tracks used to cost $.99 each, but now they’re so $1.29, so buy two and save 30-50 cents.
This is a potential way to make a few cents on those viral remixes, mashups, and alternate versions floating around by pairing them with hit singles. Example: Use Somebody by Kings of Leon is $1.29 on its own, but pay 20 cents more and get the Use Somebody Digital 45, which also contains “Knocked Up (Lykke Li vs. Rodeo Mix)”.
Interesting throwback to the old A-side/B-side convention. It’s all about working at the margins. Does it blend?
