I went to a Mets game at Citi Field last night. Post game there were impromptu vendors selling hats, t-shirts, beer, soft drinks, etc to people walking to the subway platforms. This was clearly an unlicensed, underground marketplace. Most of the vendors held up cardboard, handwritten signs saying "Venmo and Zelle accepted here." They all looked pretty rough around the edges, so I never got up the nerve to orange pill them. I'm going to another game in early July. Time to work up my battle plan.