What Constitutes Spam?
After looking around, I'm a bit confused... is an answer like this considered spam?
Why or why not?
(I guess it's "advertising" in some sense, but it seems relevant...)
When it has 8 downvotes and gets closed by user flags then, yes, it is definitely spam. And of course, a "free course on iTunes University" doesn't have anything to do with the free() function. I can't imagine that diploma looks good on your wall.
EDIT: as Brad points out in the comments, "iTunes University" is just a daft name for a video sharing site and not actually an accredited institute of learning that hands out diplomas that look good on the wall. And, presumably, all videos are free, maybe some even talk about free() as unlikely as that sounds. Easy mistake, got me, this answer wasn't actually spam.