This is off topic but people are discussing Amazon and shipping so I figured I'd ask this here, because it's always confused me. Why do so many American based companies refuse to ship to Canada or limit what they do ship to Canada (Amazon, has Amazon.ca, but the selection is nothing compared to the .com, which does not ship to Canada)? It seems strange with things like NAFTA in place that companies would restrict their market power by eliminating a potential buying supply that for all intents and purposes is very similar (in terms of shipping costs, dollar value etc). So HN, what am I missing here?