We all like to be recognized. Darth Vader is no different. He wants people to visit his website.
Fortunately, when opportunity knocks, Vader is ready with a force choke. There is, in the Wilkinson Center, near the bookstore entrance that's by the Cougareat, a reasonable facsimile of Lord Vader himself, in cardboard cut out form. He's currently advertising for something to do with children. Does that seem right to you?
Our goal, as the Arbiters, is to add a speech bubble to plug the Daily Challenge, to spread the influence of the Empire. Everyone else's goal is to put up a Vader themed sign around their neighborhood or whatever, advertising the site for Lord Vader. Take a picture of your advertisement, and post it on the site.
Picture of a Vader-tastic ad for the website: 2 points.