What is the Point of Spamming a WordPress Page?

I’m certain I’m not the only blogger that is annoyed with spammers in the comments section of their posts. WordPress does a pretty good job at putting them in the spam folder, but their “blacklist system” doesn’t seem to be doing its job. After not logging in for about two weeks, I had 12 spammers basically saying the same thing about how to improve my website. Today I had another 8 or 9 spammers saying things that didn’t make any sense, and one or two spammers posting nothing but links to junk.

I just don’t get spammers. What is the point? I don’t know of anyone that ever clicks on their sex links, purse and shoe ads, or SEO advertisements. Even if they do, I doubt they’d buy anything. It’s like the junk mail I get in my snail mail box to buy car insurance I already have – goes straight in the trash without any consideration whatsoever.

So can someone answer my question – what is the point of spam? Does it actually work? Do these people actually make money? Or are they just trying to be annoying little bastards?