Certainly.
When we look at this question of value, it is a very complicated one. As Kevin said, there's the distribution value of Facebook putting content in front of people who are interested in that content. There's the referral value of sending them to the people at the publishers' websites. Once they're on the publisher's website, it is the publisher who monetizes all the advertisement that they sell on that website; it is they who monetize any relationships they build to sell subscriptions, to solicit donations, to sell membership models, and so on.
I think those are the numbers that we don't see reported in all this, and we don't have the visibility into that side of the publisher's business as to what this means, but it isn't insignificant.