Sure, adding that and about a thousand other things, then making them work reliably, are what costs the remaining 90% of the costs to make something interoperable. Have you tried to use an interoperable EV charger (EA, Chargepoint, EVgo, Tritium, EV Connect, etc) recently and had much luck?
How about other, cheaper options (with my TSLA investment $):
1) Remind all that it is "Buyer Beware" with 3rd party, extremely high power equipment; and that if they are caught using junk, it will void their warranty - -
2) If you find signs that they are using it, block it - -
3) After a few folks' cars get damaged, you quit playing Mr. Nice Guy and fixing charge ports for free. - -
4) Ignore the whining and let your wiser, faithful customers deal with the whiners on the forums. - -
I guess Tesla's already taken the other options. How intelligent. I guess I should buy more TSLA.
Besides, the crypto stuff is a bit overkill since cheap junk won't hurt Tesla's equipment any way. It is also a bit late to put that stuff into millions of cars and tens of thousands of superchargers that are already deployed. Maybe such measures will be added to future cars and superchargers.