I think, this will be suited more fore the pro guys here that done some studies in the past... Lets say you got a site in some competitive environment. You order the usual "1000$ 10x100 $ blogposts" on real sites. but in the anchor, you put your URL, brandname, domain, etc.. but never with any keyword anchors. paid post is nicely done with "your ranking keyword" in content, h1, and title. could this be enough or would you still need some phrases or exact match links to pump the site into rankings? Without any keyword anchors, on page densitiy would have to be in some very high % - i Know that. but the questions stands: can you rank without keyword anchors or phrases without keywords in them?