Well, this is really promotional site for Y Combinator, in the same way as Joel's blog was a promotional blog for his company (Fog Creek). So by this token we (

Well, this is really promotional site for Y Combinator, in the same way as Joel's blog was a promotional blog for his company (Fog Creek). So by this token we (users of the site) serve a double function - consumers and producers of content and marketing audience, i.e. we are paying for use of the site by being marketing targets.