They aren't throwing away any revenue. If they sold it as part of the car it would either be discounted roughly like the used vs new value of the car or would m

They aren't throwing away any revenue. If they sold it as part of the car it would either be discounted roughly like the used vs new value of the car or would make the car look expensive if at full price. Instead people who want FSD can get the car for "cheap" and then pay then pay full price for FSD.