Why do these standards exist?
Each rule answers a pattern that makes a weak network easy to spot. A domain with a spam past carries that past with it. Many sites in one hosting account share infrastructure traces. Hosts that link to each other draw a visible map. Pages stuffed with outgoing links look like link sales, and thin machine-written text gives a reader no reason to stay.
None of these rules makes a link natural. They make the network less careless than a public marketplace, and the comparison is a matter of degree. Our local SEO page and link type pages explain how the same standards apply to each kind of order.

