Jesus, that is a gross way to inject advertising into turn-by-turn navigation.
Edit/update from 9to5google so this post does not spread what is apparently inaccurate information: https://9to5google.com/2024/07/08/google-maps-pop-up-quick-detour-ad/
This is a most excellent place for technology news and articles.
I’ve been wanting to leave the Google ecosystem for years but Maps was always the thing that kept me there. Thanks Google for freeing me at last!