> I can understand how someone under, say, 30, might not know how commerce happened before the Internet.

I remember those days, but I think most people would call something where you viewed a list of products and then called or mailed to order and received the product elsewhere a catalog, not a store. As for over-the-phone payments, I forgot about that method for a moment but don't think it meaningfully affects my argument. It's just as out-of-band as the mail order example I included.