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An update since we covered the company when it launched last summer: Open Book Video, the online video ad network started by former Smartcli…

Matt Prohaska

An update since we covered the company when it launched last summer: Open Book Video, the online video ad network started by former Smartclip North America CEO Matt Prohaska, has shut down. Prohaska has moved on to behavioral ad targeter x+1, where he will now be SVP of media solutions and will focus on that company’s “media sourcing, campaign management and clients’ strategy.”

Prohaska had told us in August that Open Book would differentiate itself by being uber-transparent with publishers about the rates they are getting, and with advertisers about where their ads are running. We’ve asked Prohaska what happened at Open Book, which had 12 employees at launch, but haven’t heard back.

  1. Hey Joe, feel free to call me anytime from my email replying to yours from yesterday. Looks like we just missed each other during the day ;-) Would be happy to let you know what happened at Open Book and the opportunity to join a great team at [x+1]. Thanks!

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