Because there is no loyalty risk. They are betting on a favorable regulatory environment and apathetic consumers for the next several years.
All automakers have to do is require access to that data for features, like maps, traffic updates, or entertainment.
I hate the idea of in-car advertising, and I don't like the thought my data being sold. But I do give up some privacy for functionality. My biggest annoyance with my car is I don't have Android Auto for the maps, I use google maps when driving, and video from my ADAS is used as training data.