Hopefully useful to some. I got my hopes up as I'm after a 5900x but gave up after stuffing around with the Bitpay app. As a non-crypto user, I had to make a wallet and buy $680 AUD of bitcoin to get enough for the payment, and I think there are then additional transaction fees on top of that but I didn't get to a stage where I could find out what these were. Even at around $680 I think this is a good price, but it's not worth it to me with all the stuffing around, I will wait in hope for Black Friday.
Also applies to 5950X and 5600X.