Lol, the subset of people buying coffee via ssh and shopping elsewhere via ssh is going to be insanely small, they can probably already more or less track you.

Additionally, you're probably giving a shipping address and using a card number of some sort.

Its extremely difficult to shop anonymously online for physical goods.

You could use one key per service. Almost like a passkey.

You could work around this with different private/public key pairs?

if you are aware of other stores-over-ssh, I’d genuinely love to hear about them because this one is so fun. Or even not-stores that are reachable via ssh. Any MUDs still going?