I'm considering shipping a physical good as part of the purchase of digital goods through ClickBank. The product I'm about to release appeals to customers around the world. In my testing of the product, I've found about 5 percent of my customers are in Asia, 10 percent in the Middle East, 15 percent in Europe, 10 percent in Canada, and the remaining 60 percent in the United States. I find that the inclusion of a physical product greatly increases conversion rates, but I'm worried about shipping costs increasing if my mix of customers shifts to a majority of non-U.S. buyers. With 50 or 60 percent of my customers based in the U.S., I can justify shipping the physical good to all of my customers. But if the majority of my customers are non-U.S., then I can't. I don't want to ship physical goods just to U.S. customers and run the risk of upsetting would-be non-U.S. customers. In your experience as an affiliate, do the majority of your sales come from the U.S. or outside of the U.S.?