On the last Sunday of every month, the Shelf's various ghost markets — normally clandestine, location-scrambled pop-up bazaars — briefly abandon their secrecy and operate openly for a single afternoon in designated Shelf public spaces, a tradition that began in 2209 as an act of collective defiance after a particularly brutal corponation enforcement sweep destroyed several long-running underground markets. What started as a one-time protest has calcified into a monthly ritual of radical visibility: vendors set up in full view, play music, feed people, and dare enforcement to disrupt them in public. The tradition is held together by an unspoken code — no violence, no weapons sales, no enforcement baiting — just commerce and community as resistance.