[BoppreH]

  what's interesting on the internet is open-source,
  non-profit, or not profit-motivated

You forgot "balls-to-the-wall crazy". An unusual environment is more likely to advocate creativity, from where most of the interesting things spark.

[generalk]

4chan as a whole is not "balls-to-the-wall crazy." Several of their boards are, but as a whole that's not necessarily the case.

[BoppreH]

True. But I still think it's appropriate because a) when talking about 4chan people don't think of the sane boards and b) the crazy boards hold a great chunk of the traffic (majority?), even if they are outnumbered (not that you need many of them).

Regardless of what we think, 4chan and /b/ are synonymous in most places. And there's a good reason, I don't think international press is interested in the Animals, Traditional Games or Literature boards.