So just for scale, a single ad campaign could have thousands of individual ads. Times a few dozen campaigns at a company. Times millions of buyers, many of whom

So just for scale, a single ad campaign could have thousands of individual ads. Times a few dozen campaigns at a company. Times millions of buyers, many of whom buy through an ad agency or network reseller. The scale of this problem is too big for transparency. Hypertargeting of advertisements should just be illegal.