Index Exchange's undisclosed use of bid-caching may have angered buyers and infuriated rival vendors, but it's also a symptom of another ad tech challenge: supply and demand commoditization.

For Digiday+ members: Video makers see Amazon's Prime Video Direct as the centerpiece of how the company will work with most media companies in the future.

The Young Turks Network's subscription business has grown to account for almost 50 percent of its overall revenue, with more than 27,000 paying subscribers.

Instagram is heavily courting beauty brands and beauty influencers through the recent launches of IGTV and custom Instagram Stories filters, which allow both brands and influencers to get closer to the platform.

Join Adidas, Kellogg's, Neutrogena and other top brands to learn how marketers are taking back control of their brands' digital ecosystems at the Digiday Brand Summit, taking place in Palm Springs, California from Dec. 10-12. Register by Oct. 15 to receive our early rates and get $200 off passes.