8tracks is a leading web radio music service that is also profitable. They currently have a combination of sponsored playlists and recently introduced video pre-roll ads to their ad-supported service. But 8tracks CEO David Porter told RAIN News that they're getting into audio ads because music listeners are increasingly going mobile. They're kicking things off with a partnership with AudioHQ which launched this month with a hybrid audio ad network that offers premium inventory via programmatic sales. Earlier this summer 8tracks were said to be closing a second round of funding putting total funding at a possible high of $2.9...

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