There are very different regulations in each separate country, and sometimes even in regions within countries. For instance, you can run a contest of skill (whi

There are very different regulations in each separate country, and sometimes even in regions within countries. For instance, you can run a contest of skill (which this is) in Canada, but you have to exclude Quebec. Also, the laws are always changing. For instance, we used to have to exclude Puerto Rico, but it's now okay to include them. To do a worldwide contest, you'd need to have a lawyer who knows the local rules in every country in which you want to operate. Allowing U.S. residents only is just much cheaper and less expensive. If you ever think about running a contest for substantial prizes, be sure to consult a lawyer who knows something about it. The FTC and its overseas equivalents are not shy about making sure the rules are enforced.