> So, you're saying that ad agencies are okay with just passively buying NxM pixels on somesite.com's homepage that is the same regardless of who is viewing the

> So, you're saying that ad agencies are okay with just passively buying NxM pixels on somesite.com's homepage that is the same regardless of who is viewing them? Yes, because that's exactly how TV advertising works, and ad agencies view TV advertising as much more effective than digital. > If so, why is that business model so rare? For this model to work, you need somebody to do the statistical real-world sampling for you, using surveys, experiments and all of the rest of the classical sociology tools. Companies like Google and Facebook are very much against this because it shifts the balance of market power away from data collection (Google's strong suit) to neural third parties that do meatspace data science and data interpretation.