Except the platform can help enforce the rules, as Apple does. And the platform can help the customer gain additional privacy from the seller, by offering them

Except the platform can help enforce the rules, as Apple does. And the platform can help the customer gain additional privacy from the seller, by offering them “burner” style e-mail addresses for their purchase. I would submit that any platform which doesn’t do these things is “at fault”, at least from the customer point of view.