Show me the evidence that shows full self driving is not a scam!
Different question to whether Elon Musk is a Con Artist. Con artist would imply that there is no intent to deliver. It also suggests that all efforts he makes are for the purpose of obtaining money without delivery. While this dishonest conduct should be made clear, evidence that self driving is a scam does not make him only a con artist. Conversely, evidence that it isn't a scam doesn't really make him a saint. That's the nuance that the grandparent was trying to convey.
I'm not sure if those are really necessary criteria to be considered a con artist. But even if they are, the email correspondence with California DMV in which they admit that FSD is not suitable and planned for autonomous driving implies just that: No intend to deliver. [1]