Kosumo wrote on Oct 17, 2012, 16:10: Anyone else to back up that Valve are any more difficult to contact than any other large game/software studio?
This from the Computerworld article says it all on that: "Valve did not immediately return a request for comment." Even Computerworld didn't get some type of reply from Valve to a very serious security issue. Not even a "We're now aware of the issues and looking into them." Ubisoft both responded and fixed its exploit the same day. See this.