My friend managed to get a PR4 site. He uses a GPT website to get extra money, and he said he gets it from his blog. He has one post advertising the GPT site and he says that's how he mainly gets his referrals, because that one post ranks high in google. It has a first page result for his targeted keyword. But he doesn't seem to have any backlinks for that specific post. My friend doesn't want to answer this question,n either -_-. So how is he achieving that, or rather, how can one achieve that? Does it just have to do with Page Rank?