A large number of web services are geographically restricted, such as Hulu, Pandora and Spotify. The reasons are usually to do with content licensing restrictions, or because US visitors or visitors from other advanced economies are of a higher value from a monetization perspective. A web application can only guess at the location of a visitor based on an IP address and other information, such as browser language and regional settings.
via On The Internet, Nobody Knows You’re Not In The USA – washingtonpost.com.