Why subscribe?
Subscribe to get full access to the newsletter and publication archives.
Stay up-to-date
Never miss an update—every new post is sent directly to your email inbox. For a spam-free, ad-free reading experience, plus audio and community features, get the Substack app.
Join the crew
Be part of a community of people who share your interests. Participate in the comments section, or support this work with a subscription.
To learn more about the tech platform that powers this publication, visit Substack.com.
![](https://substackcdn.com/image/fetch/w_88,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8c1c2c79-4827-41c7-8733-d92fa991f288_1638x2048.jpeg)
Subscribe to BOK on Ads (and Climate)
People
Brian O’Kelley is the CEO and co-founder of Scope3, leading the decarbonization of the media and advertising industry, and is a board member of LiveRamp (RAMP). He was the co-founder and CEO of AppNexus through its $1.6B sale to AT&T in 2018.