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Beyond the viral distribution aspect, marketers are attracted to the tracking and reporting that Interpolls and PointRoll can offer. Interpolls, for example, offers real-time data on how many times and in what way people have interacted with a particular widget ad. It also tracks how many times the ad has been grabbed and where it's been embedded--whether it was in a specific blog, Facebook or iGoogle. The ad companies also track all interactions within the widget ads that have been grabbed. "We're tracking all the impressions of the ads that were served," said Kim. "Then we track every single response to the question or click to any of the features, as well as any interactions on subsequent panels." Even Google has gotten in on the act, launching a beta of Google Gadget Ads three months ago. The ads are served on Google's content network, which reaches 800 million people, said Christian Oestlien, product manager of Google Gadget Ads.