[Nextgrid]

My point is that it's collecting way more data than the single bit it needs in order to tell "yes this ad has been seen, increment the counter".

[charcircuit]

It's not just about telling if an ad has been seen, but what a user does on your site after clicking on the ad. Do they immediately bounce? Do they buy something?

You want to be able to see that you are actually getting a positive return from the money you are spending on ads.

[jjj123]

It’s still spying even if there’s a rational reason for it.