My money is, as always, on a more mundane solution.
The cards were there to limit the number of people getting in to a manageable number, and the stamps were to ensure no one was using counterfeits. They did seem pretty intent on security in SF.
The cards were there to limit the number of people getting in to a manageable number, and the stamps were to ensure no one was using counterfeits. They did seem pretty intent on security in SF.