Happened (or rather still happens) to me too. My game X-Type[1] was stolen by a Chinese company called Leiyoo[2], who tout themselves as pioneers of HTML5 gaming.
They copied everything[3], including my tracking code, but at least changed the name to "Thunder Fighter"[4]. I receive about 20k visits per day from their domain. All my efforts trying to contact them amounted to nothing.
Btw.: is there a way to ignore certain domains in GA? This pollutes all my stats and I have no way to turn it off, other than getting a new tracking code.
[1] http://phoboslab.org/xtype/
[3] http://img.3366img.com/fileupload/html5/games/X-Type2/X-Type...