Earlier quoted context omitted.
> Advertisers know how to count money, but they are too scared to turn off advertising to find out if they even work. its publishers, not advertisers. Publishers see what share of revenue comes from Ads, and can decide to keep them or not.
Ah, fair distinction. Though also, attribution to ads is bullshit. When we turned off our ad spend at both companies, it became clear that most of new revenue was from direct (organic) sources. We had been advertising to people who were going to buy our products anyway.
Attribution is very useful for Ads platforms (e.g. Google) to build more efficient targeting models.