Nonsense Spam

We all get spam, but I've noticed that over the past several months, I'm not getting as many offers to enhance my male virility or save money on prescription drugs. (If I'd followed up on even half of them, I'd be better endowed than King Kong and it wouldn't have cost me a nickel!) Instead, nowadays I'm getting nonsense. Real nonsense. This new breed of spam seems to be made up of random sentence generators, with titles like "themselves on the his heart because of pure heart to heal thyself ". Makes it easy to identify and delete, but I'm wondering, who would go to all the trouble of spam that doesn't do anything except clutter mailboxes?