CANNES, France – While there has been considerable conversation in programmatic media circles about a movement away from open exchanges to private exchanges, it’s not a matter of choosing one solution,  but of both, says Stephan Beringer, President of Audience on Demand at VivaKi, the digital unit of the Publicis Groupe.

We spoke with during the Cannes Lions Festival.

You can find more coverage of the Festival here.