Well, it seems to be official now. Starting April 14, 2025 Google will update its Unfair advantage policy to say it is allowed to show the same ad, from the same company, going to the same page, as long as the ad is in a different ad location. Google was just experimenting with double serving ads earlier and now it is officially going to be allowed.
Honestly, at this point the dealbreaking enshittification stuff I bump into is mostly subscription requests and paywalls from the sites themselves. Which, fair enough, people need to get paid and I don’t have a particularly good answer to give them about how. I am not watching ads on purpose as a support gesture, though.