I don't understand why facebook repeatedly tries (and fails) to become a news source. They can make more money by being the world's watering hole, there is no need (and not much money imo) for going after the role of newspapers/tv. Given that their offering is exclusively popularity-driven, the quality of their news offering will always be less-than, or equal-to a very bad tabloid. If they are looking for political power, they already have it by controlling communication channels.