Index Exchange Halts Bid Caching, Used Auction Game For 50% Of Impressions

Following outcry over how it changed programmatic auction rules, Index Exchange has paused bid caching, said CEO Andrew Casale in a letter to clients Monday. The practice accounted for half of all impressions filled by Index Exchange, according to research conducted by Jounce Media and published Monday evening. The fallout from the buy side has been ferocious since the practice was revealed last week.

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