Apple does this too. They just bury it 4 or 5 system levels deep before you can see that they track you everywhere and recognize your home, work, and other frequently visited locations.
I have no proof that it is being used for advertising, but they do still have a copy of everything. Who's to know what their future thoughts about advertising will be. It's their Frequent Locations feature.
On iOS, location tracking is configurable per-app, at least. I can deny the Weather app the use of my location data while allowing the Camera app to access it.