Because I'm paranoid, that's why I'm mentioning his name
He's not well-known outside of older-school comics fans, he doesn't sell merchandise, all the Wolverine fans running around barely know who he is. And that's who they sell to.
It's not a huge loss financially, and Creatively, he doesn't play an integral part in any parts of the universe; he doesn't represent any archetypes, emotions or personalities. He is not 'Iconic' to a generation. Hell, Silent War should be a huge story, but it doesn't get covered at all. He's already semi/seperate from the mainstream marvel universe. His major appearences now are in the Illuminati series, which takes place as a retcon "in the past".
And killing characters like that creates the illusion of suspense, like any character can get it at any time, even though we really know that certain characters are safe.