[joshd]

So lets weigh up the options:

A) Let non-US customers enter whatever billing information they want. Accept that a small percentage will fail when we try and charge the credit card. Everyone else is happy and we make more money.

B) Explicitly block non-US citzens who are trying to give us money.

Oh! Let's choose B.

[tghw]

Where exactly in the article did I mention blocking non-US "citizens"? (I think you mean users; most websites don't require citizenship verification.)