I want to know how Google,Facebook,etc.. know I viewed AD? Are they know it by pixels(like in emails) on ADS or any other way?
Let Me Clear What I want to Know Take Example-
Here I Suppose UMatrix is only blocking element and no other addon/extension block AD
Go on Adblock tester. Now Suppose by-default UMatrix block everything from 3rd party. And only allow
googleleads.g.doubleclick.net - CSS and FRAME pagead2.googlesyndication.com - Script
Except this everything from 3rd party is blocked. Now refresh page and Now you can see Google ADS. I try to only allow ADS frames,Images,CSS in UMatrix as far as possible.
Why- In reality I want to support sites that runs due to ADS and also I don't want to be track across web.So From above config of UMatrix I can see ADS but My Question is How Google Know that I viewed AD. Because If I see Google ADS and Google think I blocked ads on sites because I blocked everything except above,then My seeing ADS doesn't worth the site and Google don't pay the site inspite of viewing ADS.