A US company paying for Fable with a US credit card could have non US nationals working for it, or be made of only non US nationals. How would Anthropic know? So they shut down the product.

Correct. For one data point, we are a U.S. company paying with a U.S. bank account and 2/3 of our engineers are in the U.S. and 1/3 are in Europe (a few different countries)