Why do spammers spam blogs?

I guess every blog faced it, faces it and will continue to face the spammers menace. They seems to be everywhere, spamming every blog that gets created. I spent last few days looking at what kind of messages people post in the comments section, which eventually gets taken care by the great Akismet plugin my blog trusts upon. There are rare incidents when a spam comment bypasses the watchful eyes of Akismet and gets posted until I take care of it myself. But here are some interesting observations I have made so far about these spammers and their spam messages.

• They seems to assume that nobody will ever notice their spam comments.
• Their spam comments are mostly, at least on my blog, about atorvastatin medication, replica diamond watches, sleep aids and world aids day.
• Every third spam comment is about porn. I know, you will agree with me.
• A new topic that I see most spammers are now a days spam about is forex demo account, global forex trading, forex trading platforms and online forex trading. All the links in these spam comments end up landing on one page websites that will then redirect to some other website with their affiliate links. Yes, arbitrage, but for free.
• They have now a days started using just one word in comments, ‘Nice’ and a smiley, hoping to get away from being noticed as a spam comment. They still forget that their URL section tells a lot about them.

Spammers should know that over 99% of the time their comments are taken care by anti-spam plugins like Akismet, 0.5% times manual intervention of a blog owner marks their comments as spam, and the rest of the time they succeed. When the success rate is below 1%, why spam? Why not spend that valuable time of yours to do something worth?

I don’t have a clue if spammers use some software that automatically visits blogs and posts comments for them or they waste their time visiting each and every blog and auto fill the comments section by some or the other means. But whatever it is, just a waste of time.