I'm guessing here (no numbers to back it up), but likely the reason you don't see more of this is safe drivers would sign up for it, and in insurance the safe/l

I'm guessing here (no numbers to back it up), but likely the reason you don't see more of this is safe drivers would sign up for it, and in insurance the safe/low risk drivers are the ones already subsidizing the crazies and making it work. I took part in something similar for my insurance company (Progressive) and received a whopping 6% discount for safe driving.