Wild. My brother-in-law and his friend normally run "mega-games" at events like GenCon. They told me they didn't consider it at Origins because they said they weren't allowed to charge - even for a 7+ hour event with a lot of planning and handouts. Perhaps they didn't know it was an option.I think origins allowed anyone to upcharge. It looked like from the catalog it was mostly one host group, a pro-GM co-op sort of thing, and their additional fees varied wildly from $6 to $24.
I can say that of the thousands of RPG and boardgaming events I saw in the events catalog, none were charging.
One would have to work hard to find events to pay to play.