Is it for the dinosaurs?
Or is it for startup periodicals? The old newspapers have their entrenched subscription and advertising systems that make jumping onto Apple's scheme seem more risky.
But if you were, say, a free news web site thinking of turning your web content into a more refined subscription-based periodical publication, allowing Apple to handle the subscriptions and ads while you worry about attracting eyeballs with good content might be an attractive way to lower your barrier to entry.