Because the discount double the demand of the vehicle.. making up the small deficit in margin by increasing volume. Future profit motivates the market..FSD even with it's issues is still very good and will only get better..tons of people paid for it. Plus the Twitter thing has settled down, huge engagement on the platform means there is a high likelihood that it too will succeed. Is what it is. Dude knows how to make money regardless of the antics and the negative publicity.