I question how much they could really make though. It seems like my phone has better data on me and where I go - it is always with me and I use it for more things. Thus the car makers have data but it is a lower quality source for more things. The car makers also have less direct actions they can take - they can't show a video ad while I'm driving (unlike many phone apps) and when I'm not driving they can't do anything.

They do have better information about maintenance needs of my car. However they are limited to giving that to the dealer who already can guess most of that anyway.