no, it's been explicitly stated, by Elon Musk, that if you buy FSD you get HW3 upgrade included. Long term.
In reply to someone asking about the price changes not being equal for everyone on FSD-
(bold added)
Plus, as pointed out, doing otherwise is literally impossible since FSD requires HW3.
They can't sell you something and then tell you you don't get it unless you buy other things they never mentioned in the original sale.
Tell that to all the AP1 users.