YouTube owner sent a 'cease and desist' letter to Barb and Kantar Media.
Hub launches with four 'Super Agents'.
Consolidation is part of Grey’s split from AKQA into Ogilvy in May.
It is understood the deferral affects all WPP networks.
76 years after Bernbach, Doyle and Dane rewired the ad world, DDB might be headed for exit as Omnicom-IPG merger takes shape.
Accenture Song, Omnicom, Publicis and WPP have been battling for account.
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