While we're trying harder for contests to be international, most of the time they'll always be US because that's at the request of the person sponsoring the question and/or there's the chance we have to send the prize to some jungle in South America (it's happened before) which cost more than the prize.
HOWEVER! There's nothing preventing any of you from entering so long as you can give us a US address where a friend lives that can forward on to you HINT FUCKING HINT. Some of you have figured this out already long ago. :D