I got three months of the full self driving, (supervised) as they say, gratis when I bought it by using their referral system. I have loved it, but it isn’t perfect.at least not yet. I think I will subscribe to it when the three months runs out. It is $99 a month or $8k for the life of the car. Occasionally Tesla has allowed people to keep the FSD if they buy a new car.
Didn’t know you had to pay extra for that. I would find it useful but a bit unnerving.