I should have just down-voted the affiliate link and left it at that. Something's changed in the tenor of comments here on HN, and my reaction to it isn't productive. For the foreseeable future, I think I'm going to bite my tongue and read in silence.
I'm happy for people to benefit online in proportion to the value they provide to others. Post a thoughtful comment, write a review, link previously disparate ideas? Sure, put in an affiliate link. Hijack the top comment on a thread with just an Amazon link? Not so much.
At least you were up front about it, I'll give you that. :)
Hm, looks like it's a way to funnel PageRank into some spam links at the bottom of the page. I guess the theory is that people will link to that domain's copy of Surely You're Joking and pass some of the subsequent "google juice" onward to the spam.
http://www.amazon.com/dp/0393316041/?tag=httpwwwhiph02-20