How are they grifters? Tesla gave us FSD to try for free for a month, twice now. If you don't like its performance, don't pay.
What they want from you are comments like this. What they want to do with those comments is to preserve the consensus amongst Tesla bulls that they are on their way to selling robots and renting robot taxis by the ride.
(2023) https://www.theautopian.com/elon-musk-predicts-level-4-or-5-...
https://dictionary.cambridge.org/us/dictionary/english/grift
ways of getting money dishonestly that involve tricking someone
So, they got money dishonestly by tricking someone into buying their cars based on the belief that they'd offer real full self driving now or very soon, then they didn't actually deliver that.