One such information stream that this hypothetical system would use to determine what sort of ads to serve could be could be the voice commands you’ve given to the car. Oh.. like, "START YOU POS !" ....do something with that Ford.
All they would hear from me is when I start a Ferd at work and it plays that stupid 3 tone jingle, I sing along "I hate Ford, I hate Ford, I hate Ford". Maybe it will show me ads for other brands?