Under GDPR you have the right to download the data they have about you, so google has a page where you can do that. That being said I doubt that is everything they track, I’m probably still getting fingerprinted and tracked by ip, but still thats a lot less info collected on me and most importantly that data is less valuable to sell.
There would actualy be no benefit of torturing him in secret, it doesnt act as a derrent for others in any way.