Excuse me, but this is a discussion board. The question was something that led to an answer that was useful to me and others. Your response is even more helpful and, imho, I would rather ask a question of you and the SR than dig around for an hour researching whatever topic strikes me. The search button is your friend, but the indignation over asking a question that would require a good bit of effort to ascertain seems odd.
You gotta link to the policy that states how they make the determination or why they actually leave the night games open? I've personally never heard it discussed.