Timmy breaking eggs

At Apple’s annual developers conference on Monday, senior VP of software engineering Craig Federighi showed a familiar pop-up window — a sign-in box offering the choice to “Sign in with Google” or “Sign in with Facebook.” Seconds later, they were erased and replaced with a new box, labeled “Sign in with Apple.”
The pitch is that while Facebook and Google’s sign-in services merely offer the convenience of not having to create yet another username for every single app or site you use, Apple will do the same — but presumably just as a courtesy, not a profit driver. In other words, it won’t be tying each new sign-in to an ever-growing dossier of activity information that is later used to target you with ads and follow you around the web.
“Sign In With Apple” even generates random email addresses for each app you use, to act as an intermediary that prevents outside services from gathering your real email address and using it to connect your activity across sites and apps. This means you can effectively sign in to apps with dozens of partial aliases, and cut them off at any time. Even Federighi seemed surprised by the audience response to this, which was a round of very enthusiastic screams.

Good for Timmy.  Your smart card function can generate internal, secret random numbers and keep a confidentiality contract. 

Instead of signing in why not send a few encrypted, bearer pennies and just pay for the web site directly, point to point?