@Letgoofmychessego said: "Saying good game isn't a judgment- it's sportsmanship."
Haha. Strange opinion. But that seems to be some American peculiarity. When I was in an American restaurants, the waitresses kept asking "How are you doing today?" and just were bewildered when I asked them what they need this information for (apart from not being their business.)
Of course, if goog game doesn't mean good game, then probably it should be said always. But what when I want to say: "Good game"?
But it is really strange how someone is absolutely adamant about how rude it is not to say Good Game - but tell me that greeting at the beginning has no meaning. Why can't you just accept that people are different without judging? There are plenty of similar threads like this one on how rudely paople don't say "Good luck" at the beginning ... with answers like "Oh no, wishing good luck means you can't win by your skills.", "No, it is just friendly.", "Patronizing" etcetc.