Going along with that not letting vendors get a foot in the door, I would suggest that any apostates that can somehow influence those stadium managers to dig in and not disallow the food stands to do so. The apostates could pose as delegates and request the stands to be open, complete with the food vendors. They could even request extras, so that the "brothers" assigned to sequester the flock from them would be unable to keep up. Money gets spent on snacks, and the Worldwide Pedophile Defense Fund boxes around the auditorium get left empty.
Another suggestion would be for everyone to have the one-strike-and-out rule. They go to the candy machine. If the machine is working and someone tries to stop them or their children from using it, the whole family is gone for the duration of the program. The motel money is not altogether wasted, since the weekend could become a tour of the city. For the amount of money that would have ended up in the Worldwide Pedophile Defense Fund boxes, I suspect that quite a few video games could be played or a bit of shopping could be done.