'It's a black hole': Marketers are taking more control over their co-op advertising - Digiday

'It's a black hole': Marketers are taking more control over their co-op advertising Digiday Tierney Wilson, director of digital strategy for the agency January Digital, recently got what was once an unusual request. A makeup company asked how it could negotiate its co-op ad dollars with department stores to make sure the dollars were spent a ...

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