I'd hazard a guess that the title here is making fun of the claims elsewhere on HN that Michael Jackson was a "hacker" in his own way.

(I'm not sure which would lead me to a lower opinion of the submitter's taste: if he actually thought that "infomercial hacker" is a good way to describe someone who made infomercials, or if he thought pretending to think so was the best way to criticize the idea of calling Michael Jackson a hacker.)

well marketing is related, and you gotta admit the dude could sell anything

Hack yes.