Only paying cash for privacy reasons is a good metaphor: not only is it kind of a pain to carry cash & not run out, but some stores have stopped taking cash. Fo

Only paying cash for privacy reasons is a good metaphor: not only is it kind of a pain to carry cash & not run out, but some stores have stopped taking cash. For example, my favorite coffee shop on University Ave in Palo Alto :-( BTW the license plate thing has been done by my friends with store loyalty cards, but after a while everyone got bored doing it.