[Contax]

I don't know what it takes at the scale of something like Wikipedia, but at my own scale, a single/self-employed developer, yes, hosting costs are a small part, but then I have to eat, a place to live, replace hardware, pay bills and taxes and much much more, things none of my sites could exist without.

Hosting is nothing without coders and maintainers, regardless of if the main content is contributed free, and decent coders and maintainers, software and hardware engineers, aren't cheap and don't count as hosting costs.