Originally Posted by Lapsus

.....III) A user may have more than one thread open if each thread serves a different purpose. Note that having multiple threads with the same purpose (more than 1 Sale/Trading/Buying thread) may result in infractions (this includes using alt accounts).

Purposes:
.....[A] : Auction : For auctioning off art/items.
.....[B] : Buying : For requesting art/items.
.....[S] : Selling : For selling art/items.
.....[T] : Trading : For swapping items.
.....[R] : Request : For requesting art