Because this is what drives traffic to blogs. He's hacking here, just not code. It's also a little game theory, as Arrington's willingness to publish anything anyone does to screw him probably also makes people think twice about doing so.

Also, it's not unimportant to startups. Jason is an angel investor. If this is even half true, I'd avoid having Jason invest in my startup. You can divorce your wife more easily than you can divorce your investors.