Mike Rich, vp of media for comScore, says there are 400 billion advertising online impressions a month -- and growing by 15%. That's not good.
By way of comparison, if you look at traditional TV -- 45 minutes of content and 15 minutes of commercials per hour -- at this 15% rate in 10 years you'd have nothing but TV commercials.
This trend isn't good for display advertising. "This is not a sustainable track. We have to find a way to constrain this. We have to find scarcity."