Did you know that when the Windows Phone Marketplace opens up in new countries, your app does not automatically get distributed there unless you log in to App Hub and update your app.
I would suggest that you check you country distribution from time to time to ensure that you reach the maximum number of Windows Phone users, especially if you app is globally relevant.
Please note, that even if you originally selected “Worldwide”, you still need to reselect this when new countries are added.
For more info, have a look over here: http://windowsteamblog.com/windows_phone/b/wpdev/archive/2012/03/15/app-hub-accepting-submissions-for-new-markets-soon.aspx



