Not bad for a spam comment

Your ideas on signalling are always interesting and informative….but,
you focus a lot on signalling to others…..the more fascinating aspect
is the signalling that we do to ourselves…..and why.

I deleted the comment anyway, to prove to myself I am tough and that I abide by the "no spam" rules. 
Behind it was a link to a German site selling computer products.

I assume that above comment was written by a human being.  A' la Turing, I wonder when the average quality of spam comment will exceed the average quality of a non-spam comment.  For many blogs (not MR), we're already there.  Can you imagine blogs competing to capture greater and greater quantities of spam, as a way of "paying" for good comments?  Or how about captchas which only let through spammers and discriminate against most others?