A quote from a discussion about the new Google search changes, from a guy who operates an aggregator:
There is very little "truly original" content out there, virtually every single blog rehashes the content of others. Is Techmeme of no value? Is Digg of no value? Is Topix of no value?
Also, we do actually produce some original content, we have a small staff of writers who create "featured posts" every day…
See the problem? It’s not that sites like his are polluting the internet with mashed up articles from around the web, it’s that the true original content is very little. So I am asking the question he forgot to ask: why is that? Because of sites like his, of course!