Seems like Spam to me, he's not adding to discussion other than linking to his site. However he is actually running a podcast where they discuss the question he's responding to (in fact he's reading the question to a "Dr. Justin"). On one hand it's a pretty bad podcast -- sounds like they are talking into tin cans -- so it may die out on its own.
I'm a bit on the fence with this one. Certainly smells like Spam.
Examples, since appearantly I work for @Stephen 4 now: