The Tragedy of the Commons refers to the overuse of a shared commodity that takes time to renew. I do not see how this applies to newspapers.
* If any one paper gives their news away for free, it makes it effectively impossible for other newspapers to charge money.
* If all newspapers give away their news for free in exchange for advertisements, they all lose money.
I guess the prisoner's dilemma would technically be a better term, but it's basically the same thing in this case, at least if you think of advertisers as an over harvested resource.