They haven’t added ad tracking. That’s a fake news. You should read up on how it actually works.
I’ve read up on how it works and it says it’s tracking how well or badly ads perform when shown to me. That’s tracking ads, otherwise called ad tracking.
What now?
It’s tracking how well ads perform without tracking individual users. Tracking ads isn’t the problem. Tracking users is the problem. Before this the only way to track ad performance was by tracking users. This is a way to track ad performance without tracking users.