Readers to determine cost of ads at Digg

At Digg.com , readers submit articles from elsewhere on the Web and those news stories appear on the site based on their popularity, which users vote on. The same thing is about to happen with the site’s ads. On Wednesday, Digg announced plans for a new advertising platform that will intersperse ads among the streams of stories. And like those stories, users can vote on the ads moving them up into a greater place of prominence on the site. The more people like an ad, the less marketers ha…