This sites purpose is to display images posted in reddit’s various subreddits in a way that they're easier to view. It lurks reddit and its parts for images.
In another words, the only relation that this site has with reddit is that it reads its content and displays part of it (the images) in another format. Other than that, reddit and RedditLurker are two different sites managed by two different groups.
How it works
Reddit allows its content be retreived via their API. The RedditLurker site reads any subreddit and looks for posts that have images in them to display. Being that way, the number of posts that might appear per page may vary deppending on the number of posts with images in the subreddit being displayed.