I don’t think this guy has hacked surveillance pricing in ways that are practicably replicable, but his video has piqued my curiosity.
Edit to add: There doesn’t seem to be much in the way of evidence-based, practical advice currently, except to shop in physical stores and to comparison shop. https://www.kqed.org/news/12088157/surveillance-pricing-is-making-life-more-expensive-heres-how-it-works-and-what-you-can-do
