The "requirement" has been pretty much moot, as we have found most of the people who are willing to volunteer will put in more hours than we have required. They see the core organizers going for weeks without sleep (hyperbole) and putting in many hundreds of hours per year (true), and want to pitch in and do their part to try and keep us from quitting!!! We even have a lot of folks who pay to come, and still volunteer time. (They have figured out that we don't run at a profit, and again don't want the show to stop.) It is always heartening to see paid attendees stick around after the show to help get staff games back on trucks, or show up early to help set up, clean, fix, or whatever needs to be done. I have met some extraordinary people while doing my zombie version of breaking down games. They want to help, and we're thrilled to have a willing pair of hands and a back that still functions offered! I'm always happy when someone hands me a sandwich in the middle of a setting up frenzy
We have a philosophy that nobody should miss the show because of lack of money, so we offer the lower end volunteer option. I think the requirement is something like two hours to get admission for the day. There are a few people who take that offer, but many, many more who pitch in beyond the minimum.