A few weeks back in an article published on Centro’s blog titled “What do you mean you don’t see my ad?” I wrote this about viewable impressions:
“What if print advertisers only paid newspapers for the ads that were seen by their intended target? As in, “Hey, our ad on page 5, Section B wasn’t seen by 34.5% of the audience, so we’re only sending you a check for part of the contract.” Not possible? The stuff of a futuristic Sci-Fi world where devices are implanted in our eyes and monitored by unseen beings?