Im trying to find out how fog.com uses googles url builder to relay referring sites domain in the utm source. Ok for example if you goto http://gamesphysics.com/292-Robin-the-Rescue.html and the game loads you see the fog.com preloader if you click that it will take you to fog.com with the GA tracking on the end of the URL, but it includes the gamesphysics.com URL so you can know where the traffic came from when you are looking at your campaign analytics. Reason I want to know this is because I cant find (google) where this code is and sometimes I get some huge spikes of referring traffic from sites that have added a sponsored but I can never find out what that site is to follow up with them and try to submit more games to it etc. thanks for anyone that will know or be able to find the code I would be grateful