Ask HN: Why do people create incomprehensible spam?

I run a blog with comments and spam's a bit of a problem. I get that in some cases people try to put links on their for various reasons. However, we also get a lot that doesn't seem to serve any purpose. for example, on from today:

"chanel 化粧品tf szn bttt fy mlfpy urdirp cfyss

pletcherdrw - March 15, 2013 @ 8:08am

ku gcfd hsff pvs tqmu hntu qyo xdij gb fb rxi sjrp jszl hww hwdj kigk zav vkbx sc"

They've had to beat a captcha to post that. I know that's not the most difficult thing in the world, but it does require some effort. What advantage does this create for anyone?

According to Google translate, the Chinese characters mean 'cosmetic.'