> Why, oh why, would a company built on ad revenue want to reduce ad spend? > These companies are perfectly positioned to make ads more efficient - and they have absolutely no reason to do so. The question is not really asking about reducing ad spend, it's asking about reducing advertiser costs per outcome. It's pretty obvious that if you decrease costs per outcome, return on ad spend will rise, and advertisers will…
The "attribution mechanisms" you mention are precisely one of the drivers for the pervasive data collection that is in AdTech.