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/
I’m going to paste here the comment I wrote on another post about this same issue:
Organic Maps and OsmAnd are not adding ads during navigation. Nor “promoted pins”. Nor ads when browsing the map. Nor tracking your every move.
Seriously, give them a try. And remember that, if the maps are lacking information, you are free (and encouraged) to improve them on OpenStreetMap.
But they aren’t providing live traffic congestion, right? That’s the only reason to use Google Maps. Not because of the maps or navigation.
Magic Earth gives you live traffic info, and is based on Openstreetmap. Not open source though (unlike OsmAnd and Organic Maps).