[foota]

It's not subsidizing though.

It would be subsidizing if the effect were that Americans pay more so that people in other countries pay less.

But the alternative to Americans paying more isn't the other people having to pay more, the alternative is the product not existing. (or, alternatively, the company making less profit).

There might be some cases where if the US market didn't exist, the price in another country would go up, but it would happen because a company wasn't able to sustain a lower price with the reduced quantity, and would therefore have to settle for selling less quantity at a higher price.