I think the content of the game is important. For games where it relies exclusively on luck or number generators to match for a win, that's completely randomized and can't be "rigged." For this particular game where HOST_Duchess was presumably the one manually deciding where each plant should go, it is easy to feel like this kind of game could have been rigged in someone's favor. I don't actually think there was any rigging going on, but for the sake of the conversation, it must be taken into account that a game like this one could theoretically be "rigged," and it'd probably be in the staff's best interest to refrain from playing games that do not rely on luck or chance, but do rely on a staff member deciding the winner.