The ad industry has measured, and tracking means more revenue and more clicks. How much more? 2x. Not more. But 2x is 5 years of 15% "normal growth". They will

The ad industry has measured, and tracking means more revenue and more clicks. How much more? 2x. Not more. But 2x is 5 years of 15% "normal growth". They will absolutely not accept going back in time just 5 years in terms of revenue. They will fight to the death over every dollar.