Hitting the nail upon the top without having side effect

I don't know what to say.  This isn't even the weirdest of the latest spam messages.  Mind you, these aren't spam comments in the conventional sense.  That is, no code (far as I know), no links, no nothin'.  What do the spammers get out of them?  And are the spammers human?  These things could be products of programs gone mad.  I don't know what "programs gone mad" could mean, but it makes more sense than any of this stuff.  Read on:

Definitely believe that which you stated. Your favorite reason appeared to be on the web thhe simplest thing to be aware of. I say to you, I definitely get annoyed while people consider worries that they juet don't know about. You managed to hit the nail upon the top and also
definerd out the whole thing without having side effect ,
people could take a signal. Will likely be back to get more.
Thanks 

These do not sound like someone struggling with English.  They would make more sense.  These are like computer-generated attempts to mimic actual comments.  Who or what is doing this?  Should we care?  They're awfully entertaining--I know that.

I have, by the way, gotten a couple of traditional spam comments, with links to whatever.  But these are a new breed.  Who can explain them?  Or am I simply considering worries that I juet don't know about?  Can I manage to hit the nail upon the top and also definerd out the whole thing without having side effect?  These are the questions that keep me awake at night.


Lee