One could imagine you could sign up just by opting in on your navigation app. However, I think practically speaking, I don't want the roof of my car damaged, s

One could imagine you could sign up just by opting in on your navigation app. However, I think practically speaking, I don't want the roof of my car damaged, so there would have to be some capital cost to create some kind of roof protector landing pad thing. So that might limit adoption. On the other hand, if I drove a pickup truck, I wouldn't care. I would opt in without any changes to my vehicle. I would just need to make sure the bed is empty.