Yeah if you look the app and juan xavier, he has a site that explains what happened. In short it's no longer active. He still supports it and uses it, but only to those that had donated before. Here u go XBerry Live! for Blackberry Smartphones | Juan Xavier Larrea
edit: this is why u are getting the gamercard error. Not sure if you donate now if you can still get it. i would donate if it would get me xberry. Let me know if you contact him or if you figure something out.