They're worth that much because they get ads in front of people and because its cheaper than manually and intelligently target ads like newspapers used to. Not

They're worth that much because they get ads in front of people and because its cheaper than manually and intelligently target ads like newspapers used to. Not because of its effectiveness nor its quality. Adtech is the mac donalds of ads, and mac donalds was so big and effective that they made a movie about it, does that mean they make a good burger and don't ruin the planet making people think they can eat meat cheaply when in all truth it has massive externalities on our ecosystem and our healths ? And sorry for the bold statement as it is indeed based solely on the tiny view of the world my senses allow me to have. I would however love some of you to tell me some "personal" anecdotes about the effectiveness of adtech on them, I'm curious honestly. I'd be google and facebook, I'd sure as hell continue diversifying away from adtech as much as possible because you are right, no one is stupid here, hence GDPR.