Are poor people invisible to science fiction fandom?

Convention fandom isn't cheap—two adults who want to go to a major US convention that's not local should plan to drop a thousand dollars or more on transportation, hotel, and meals. Travelling to distant cons simply isn't possible for many Americans. Even local cons are unaffordable for many—remember that in addition to the US's millions of unemployed folks, the working poor, who earn less than the poverty line, number 46.2 million.

I know of three fannish organizations that cover convent...