I used to mail money orders to people to buy things over the Internet as a kid, before I had access to a bank account.

Before you could just buy Pocky at any old Walmart in the US, I remember mailing Celga[1] a money order to purchase some directly from Japan…

[1] https://www.celga.com/

Mailing them something isn't "over the internet". You might as well say you could get on a plane. How do you do it as a digital transaction that doesn't take a week to go through?