Congrats on shipping! Although I don't have time to play right now, a perusal of your rules has me scratching my head... why allow people to have alt accounts if they can't do anything with them besides level another character? Some of these rules seem really awkward for an mmo eg. having a moderator remove your ability to trade if they don't like the price? Come again?
Alts are useful for trying out many different builds.
Trading bans happen very rarely, mostly people posting buy offers for ridiculously low amounts - since we are available on most devices and have players with all kinds of vision problems we tend to remove such offers so people don't accidentally click and accept them.