It turns out when you have a simple and obvious business model, it's easy to pay for content - iTunes enabled us to actually buy music (kind of, we're in the middle of screwing the artists over with bulk streaming deals and what I suspect is a lot of RIAA-contact lock ins preventing direct sales).
But really, how valuable do you think your blog post about someone else's blog post is? Or a news site reporting on what happened from Twitter, or publishing articles which are taken whole-sale from bullet pointed corporate and political press releases?