I think you're onto something... as far as that pattern goes. New guests definitely can't play a game if they don't have a suit and rank, so that makes sense. There was a post on the network a while back about the suits. It's prolly a little too early to confirm it, but maybe there's a connection between the effects of the suits and the games.

what would make something Summer-related? The heat?

[ Her follow up question is similarly sincere. It's not only because "summer" can vary from planet to planet: Topaz has never taken time off to enjoy a beach on a summer day, so she genuinely has no idea what to expect. ]