As predicted, Chad and Ryan Steelberg are not happy. The founding brothers of radio ad broker dMarc, purchased by Google last year, have bailed. It must have stung to see the Youtube kids rolling around in hundreds of millions apiece in stock, while the dMarc deal's value shrank to a total of $200 million or less in earn-out (down from a much-ballyhooed possibility of $1.13 billion). Google's obsession with automating the ad-placement process gets some blame, versus the Steelbergs' emphasis on human reps. Too bad about the extra billion, though.