It is important to understand why this innovation did not happen in the U.S.
In Europe, the old national postal systems have to compete for customers, thanks to EU deregulation.
In the U.S., where the postal service regular mail is a monopoly, it is not in the postal service's interest to innovate and offer new services-- they make money from people buying, storing, and never using physical stamps.
Comments
It is important to understand why this innovation did not happen in the U.S.
In Europe, the old national postal systems have to compete for customers, thanks to EU deregulation.
In the U.S., where the postal service regular mail is a monopoly, it is not in the postal service's interest to innovate and offer new services-- they make money from people buying, storing, and never using physical stamps.