[MikusR]

Because if you follow the link you get http://practicaltypography.com/graylist.html. That page has about the same amount of content as a typical spam page.

[Jaruzel]

He's just blocking high traffic referrers. Which I agree is odd. It's not like his site is media heavy.

[jessaustin]

He attempts to monetize without resorting to ad networks. A laudable goal, even if the methodology is idiosyncratic.