Xxmoonlightkittenxx uses Flash trading to scam. Before the scam giveaway, they establish some rules, such as no drama. Anyone who violates the rules is locked out.
They start with a safe giveaway round and give the prize to their spare/helper, 5000canary, then continue with a Flash scam. They explain that you accept, then accept, then decline, like you're trolling them. However, they can easily accept an overtrade and lock the den. If they finish the giveaway, they announce 5000canary as the winner again.