@bagder "this advert was served 30 thousand times and sales increased 7%" is more than good enough, and more than enough for most businesses. Certainly the ones I've worked with.
You get that from your metrics
The rest is weird bollocks for the sake of weird bollocks for the sake of a problem that doesn't exist for the sake of the people who've grown fat off this bollocks.
@jspc @bagder weird bollocks and frequently an outright scam, because ad platforms have every incentive to cheat - they have all the information.