If targeted advertising worked the way they say it does then why is Amazon with my entire purchase history at their disposal, still unable to stop themselves from trying to sell me a second washing machine just after I bought one from them? Or Audible with hundreds of books in my account, most of them English, is still trying to sell me German versions of books with original English language versions? The whole notion that advertising has all that data to do better advertising assumes a competence level that just isn’t there.