It used to be this way. But American tourism has spread tipping to many countries.

It is quite opposite way from the Korean's point of view - Korean tourists learn about the tipping culture when being asked for the tip by an American waiter for the first time in their life.

Our worst export, surely.

I would say the worst export was a hard stance against drugs.

And sugar-heavy foods (coca-cola and soft drinks, sugar-heavy processed foods, etc)

I remember someone on reddit said there was a coffee shop in Iceland that tried to be American-themed, and it had a fake tip jar with fake bills and coins in it, just to look like it would in America.