Following the Money on the Santa Fe Plaza

Final note on Santa Fe: the hawkers of Indian tschatschkes jewelry under the arcade along West Palace Avenue at the north side of the plaza--who gets to trade there? It looks like "public" space, so I don't suppose it is a straight rental. Does the city charge rent? Is there a lottery? Do you have to know the mayor's brother-in-law? Or is it just some guy with a 17-inch-neck? The one thing I can say for sure is that there isn't enough to go around, and one way or another, it can't be free. But how, exactly?