Taking a blind guess here because I have never worked at Google, but I would assume there is one organization that has the data, and another organization that can block IPs from clicking on the ads and consuming the spend. There is a byzantine process preventing that second org from getting the data along with a lack of motivation because it would decrease ad-spend, which is one of their key metrics. Org2 which deals with people clicking the ads is a bad place to work and no one who is actually good sticks around long enough to navigate the process and implement this, so the can gets perpetually kicked down the road.
Tends to be how it goes once you reach a certain size.
Tends to be how it goes once you reach a certain size.