The author is a very talented applied cryptographer with a very impressive resume (he is looking for new projects). The following CV line stands out however: Google: Software Engineer, Ads Review. June 2014– March 2016. Angular / Java developer on the internal tool used by contractors to review Google ads for policy violations. How did that saying about "brightest minds working on ads" go? I am not blaming the author…
And yes, everyone in the industry knows that ads don't work, you have all the ad blockers, etc.