Episode 153: Scott Spencer invented RTB, now he’s taking on cookie banners

Scott Spencer, co-founder of Rewarded Interest and former DoubleClick and Google product leader, explains why cookie banners failed, how consumer privacy still feels broken, and what it takes to give users real control without hurting publishers or advertisers. Takeaways RTB wasn’t invented in a single moment. It emerged organically as multiple teams solved latency, bidding, and scale problems in parallel. Cookie banners fail both consumers and regulators by creating friction without real control or understanding. Rewarded Interest aims to replace site-by-site consent with centralized, programmatic privacy preferences across devices. Privacy control likely belongs above the browser level, especially as agentic browsing and AI assistants become mainstream. Changes proposed to GDPR may reduce protections around pseudonymous identifiers, increasing the need for user-centric control tools. The industry risks pushing users toward ad blocking if it can’t offer meaningful, trusted privacy solutions. Scott’s biggest regret from the RTB era isn’t technical. It’s not taking time to appreciate the magnitude of the transformation and the people behind it. Chapters 00:00 Intro: Scott Spencer’s DoubleClick and Google legacy 01:29 Year-end notes: Marketecture Wrapped and MadDB.ai 03:35 Why Scott founded Rewarded Interest 05:00 Coalition for Better Ads and reducing ad blocking 06:20 Why cookie banners are broken 07:55 Centralized privacy control across the web 08:52 Browsers, OS-level identity, and agentic browsing 10:54 Minor mode and protecting children from tracking 12:10 Do consumers want granular control? Rewards and defaults 13:43 GDPR, Digital Omnibus, and Europe’s direction 18:21 Aligning incentives for users, publishers, and ad tech 21:56 22 years at DoubleClick and Google 22:12 Did Scott invent RTB? Network proxy bidding explained. 31:00 The Refresh: Google, Meta scams, and agentic ads 54:15 Wrap-up: YouTube vs Netflix and the Oscars move Learn more about your ad choices. Visit megaphone.fm/adchoices