Looking at some really big sites I'm beginning to wonder - Do you really need to create backlinks yourself to get higher in serps? What would happen if you build a big site (lets say about 5000 pages) and all of the pages are indexed? I'm ranking for some long tail keywords (and getting traffic from them) and I never really build a link for pages containing them, not a single one. So what would happen if you focus on unique content (Lots of content) instead of building backlinks? Any idea? Anyone tried that?