Money isn't permitted except for the initial tickets, as well as coffee/ice (all of which are sold by the organizers). It's otherwise a gift economy. Reciproca

Money isn't permitted except for the initial tickets, as well as coffee/ice (all of which are sold by the organizers). It's otherwise a gift economy. Reciprocation is fine, except that the initial gift shouldn't be given with the expectation of reciprocation. It's a subtle difference, but it works out OK. Some would probably object to the term "economy" as well -- you're supposed to have arrived with everything you need to survive, so all the exchanging is just for fun.