This has been around for a while, and it's annoying. Essentially, if a player has VIP the player can grab a trade table without needing $21, and when they do this they can accept the trade causing it to "not complete." Keep in mind that they don't have $21, I'd like VIP players to still need $21 to grab a table and to complete a trade, because this is annoying to deal with when you really think you are about to get the item(s) that you wanted.