To give a feature you must be one of the first 20 people to do so on the blog when posted. The news article is the feature, it is the blog one must participate on. And if you are not one of the first 20 people, the feature does not get in. So it is a right place at the right time kind of game.
We have a limit at 20 to keep the article at a reasonable size and to have a fun atmosphere trying to get a suggestion in before the deadline. And we make sure that people participate on the blog only because it would be very difficult to keep track of the first 20 between both the news and blog.