33Across launches ‘first open exchange with only viewable inventory’

Original Post: http://feeds.marketingland.com/~r/mktingland/~3/ba-5krW7DDI/33across-launches-first-open-exchange-with-only-viewable-inventory-249158

The ad platform’s new AttentionX exchange scores ad space pre-exchange, making a viewability guarantee ‘superfluous.’

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