I wonder if this is correct. I’ve always thought that links to pages within a domain really didn’t amount to much in Google, but perhaps I was wrong.
The PageRank algorithm is most famously characterized as valuing links that are highly referred to by other people. It seems that is only part of the story. The PageRank algorithm values links to yourself more. That is, a website that has many pages and is densely inter-woven with links becomes a sort of PageRank machine.
To read later: Pagerank Explained