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You have to basically drive like a grandpa for a few months to even be eligible. They give you a driving score, and if you take all the fun out of driving a Tesla, then you might become eligible for FSD Beta.
I spent months trying, and never got my driving score to the point of qualifying for FSD Beta. I think you need to have of a score of 98 or 99 (and I was in the 70s).
[1] The Beta is free (or rather, only available) if you have regular FSD. Regular FSD costs $15,000.
Regular FSD, otoh, is really not that impressive. Especially in comparison to Enhanced Autopilot. The extra value add is minimal.
Enhanced Autopilot already has all the gimmicky features you might want to use to show off to people (like Smart Summon, Autopark, etc), and it only costs $6,000.