Actually all that stuff is standard 501-C-3 non-profit type (C3 is the educational classification so “lessons” and “teacher development opportunities” and “circulating libraries” are standard fair). And it’s as expensive or as cheap as you make it. I work with a C3 it’s a sci-fi convention, we do a little outreach stuff with the library and all that other stuff is just ways of looking at normal panels. C3’s are the most common of the NPO designations and include pretty much every museum in the country, and yes some do get government grants, but they’re still by and large funded through members and visitors.
I guess I’ll have to take your word for it. (or do my own darn research)
Happy FReeping!