It can certainly be an uphill battle, with a user base that pales in comparison to the iOSes ad Androids of the world -- and then there's the fact that the OS hasn't actually launched in the States yet.

ENGADGET: The Engadget Interview: BlackBerry developer evangelist Tom Anderson (video)

For an apples-to-apples comparison of network programs of differing lengths, the series are ranked based on ad revenue per average 30 minutes.

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