The Strange Mystery of Return to the Edge of Nowhere Part V

Google's spam filters do a pretty good job of protecting this blog from comment spam, but one particular post seems more vulnerable than others: Return to the Edge of Nowhere, Part V. Two or three times a month a spammer - usually from Australia - will leave the typical "great blog" or "awesome post" message that's really just a cover for the website links they're pushing, only discovered when you click on their username, which appears above the comment they've left.

It takes only a second to delete this sort of spam, and it doesn't really bother me very much to do so. But I do wonder why spammers - or, more likely, their automated software - targets this particular post so often. There's nothing particularly remarkable about it; it's the halfway point of a story about Leaf Rapids, Manitoba, a subject of limited interest and therefore one would imagine little profitability for spammers. The post does feature an abnormally high number (for this blog, at least) of photographs and embedded videos; perhaps these somehow act as flags for the spambots.

The problem isn't a greatly troubling one, but I am curious about why this post gets attacked so disproportionately. I welcome any insight from my more web-savvy friends.