The no RLC rule here is mainly talking about the exchange for anything forum related like collectibles or TBT bells or in-game items. The same goes for exchanging any goods of monetary value for collectibles or TBT bells. A free giveaway (eg. No tbt entry fee) for a game should be fine, but you should clearly state that all participants in the giveaway be of age or have parental consent since the winner will be giving you their personal information. I did a postcard giveaway once a few years ago, which is kinda like the same idea

I’m actually not sure about the shipping thing though.