The more views per article, the more they can sell ad space on the side of the screen. (religion.blogs.cnn.com)
Clearly, it's illegal for foreigners to buy political ads, but is it illegal to sell ad space for political ads to foreigners? (politics.stackexchange.com)
People are rarely buying ad space for print these days, and when they do, they are likely to use an application program interface to place the ad themselves. (careerladder.sg)