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Google Maps tests new pop-up ads that give you an unnecessary detour
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
I've had something like this happening to me a long time ago. While going from a city in Uruguay to a city in Argentina, Google Maps "suggested" a route that was 2 hours longer but took me through the ferry (a paid business). Even though I chose "keep my route" several times, from time to time, the suggestion popped up with a "time limit" to confirm. If I failed to notice it, the suggested route would be selected.