They are also required by law (IIRC) to include more and more invasive black boxes in the cars anyway.
So i guess they figure they might as well use the data.
(I'm just waiting till my car says "Tired of stomping on the brake so much? Maybe you should stop commuting and try UberPool!")
In theory, it sounds like a good idea but I learned recently that police can quite easily download the data from them (via the OBD port) and apparently it is common for them to do so when investigating accidents -- especially fatal ones. AIUI, they are not required to obtain a warrant in order to grab this data and that is my primary concern.
[0] https://gdpr-info.eu/art-21-gdpr/ - They are already in place at a EU level, but member states have until 2018 to bring them into national law.
I can't say with 100% certainty that it is happening, of course, but I do think that, yes, you should expect that it is. If, by some chance, it isn't happening, well, I'm sure it's just because they haven't figured out a way to make a dollar from the data yet. Give 'em time.
I am actually pretty convinced that my truck "phones home" at regular intervals and sends at least some data back to the mothership (odometer data, in particular, but who knows what else), especially after a recent OTA-delivered software update (the first that I am aware of since purchasing the truck). I would not be surprised at all to learn that my car also does so. Both vehicles have built-in (3G) cellular connectivity and both have apps available for interacting with them in various ways from a mobile phone (FWIW, I have never installed them, set up the necessary accounts online, etc., and never will).
In addition, ISTR hearing about (maybe a year or two ago?) some "data broker" that was purchasing vehicle data from manufacturers (or planning to do so, perhaps) and turning around and selling that data to automobile insurance companies. "Oh, he likes to drive 15 MPH over the speed limit? He's never been in an accident or been cited but let's go ahead and raise his rates anyways!".
I have thought before about looking into how to disconnect the cellular radios in my vehicles (especially the Dodge RAM -- cf. Charlie Miller's work) but, now, I think I may go through with it.
N.B.: My vehicles are 2013 (Dodge) and 2014 (Nissan) models. I'm sure things have only gotten worse in the few years since then.