Ad markets are horribly inefficient / thin on info, even in the efficient case*, that its absolute solid gold to know that ex. you purchased baby formula once a

Ad markets are horribly inefficient / thin on info, even in the efficient case*, that its absolute solid gold to know that ex. you purchased baby formula once a week for the last 6 weeks. * this is proxy grumbling about codecov.io ads appearing everywhere for a couple days every time I visit the site...but I've been a paid subscriber for 6 months