Followers: 1.5 million
Sample tweet: "You still have a few hours to get the Strokes' brand-new album Angles for just $3.99: https://amzn.to/e9ytse #dailydeal"
Amazon's MP3 store has a selection to rival Apple's, and, in contrast to its discount-averse rival, launches frequent specials on its Twitter feed. But even if you're not ready to buy, the feed is a good place to discover a fresh playlist.