ISBA, the trade body for UK advertisers, has said the report by its American counterpart, the ANA, exposing secret media agency rebates, should make brands outside the US "sit up" and "take action".
ISBA, the trade body for UK advertisers, has said the report by its American counterpart, the ANA, exposing secret media agency rebates, should make brands outside the US "sit up" and "take action".