It's interesting to realize someone can do this for about $0.01/site/month. It makes one ask the question "just why do we need ads for social networks"?
Advertising is lucrative as hell right now, and is propped up by it's true market value being hazy (FWIW, I think advertising is probably overvalued right now). Neocities would make a lot of money if we put advertising on the sites, but of course, that would also destroy the site, just like it did with GeoCities.
The big cost at most social network startups is labor. Infrastructure expenses are somewhere down there with the free bacon budget and the open bar tab at OSCON (I'm joking, but you get the idea).
