8. The computer-implemented method of claim 1 , further comprising: accessing agreement information that corresponds to agreements entered into by each owner of a news story in the plurality of news stories, wherein selecting a plurality of news stories further comprises preventing one or more news stories from being selected based on the agreement information.
8. The computer-implemented method of claim 1 , further comprising: accessing agreement information that corresponds to agreements entered into by each owner of a news story in the plurality of news stories, wherein selecting a plurality of news stories further comprises preventing one or more news stories from being selected based on the agreement information. 9. The computer-implemented method of claim 8 , wherein the agreement information comprises at least one of a revenue sharing requirement, an article modification requirement, an attribution of source requirement, and click-through behavior for the one or more items of promotional information.