CANNES, France—Crispin Porter + Bogusky, an agency whose vitality has been questioned since Alex Bogusky left, has issued a strong rebuke to those who would question its continued relevance by picking up its second Grand Prix in Cannes this week—a Direct Grand Prix for American Express's Small Business Saturday campaign, which already won a Grand Prix in Promo & Activation.  Digitas was co-creator of Small Business Saturday. Read more about the AmEx campaign here. 
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