Should you not be concentrating on driving when you're operating a tonne+ of metal at speed?
I can think of circumstances when knowing -say- what food is available in the next few miles would come in handy; but it should absolutely, definitely and positively be a pull from the driver (after they have got safely into a lay-by or (let's be honest) a straight bit without too much traffic) and not a push from advertising companies. Otherwise it's dangerous and will kill people sooner or later.
Also, the data belongs to the car owner. It is very important to remember this.