In order to test our game in low bandwidth and poor network situations I'd like to apply traffic shaping on my machine when talking to the GameSparks servers.  In order to avoid this impacting my other network traffic I'd like to apply the traffic shaping rules to only the GameSparks servers, so please can you tell me the IP address range(s) I need to use?

Why can you not provide that information?  Surely someone at GameSparks can look up that information and let us know?  The particular reasons for testing our game in low bandwidth and poor network situations is that we've had bug reports of it not handling those conditions very well and we'd like to improve our handling of those situations to provide a better user experience.