One of the hottest trends in Link Directories is the ability to offer bid for position links. Just like any other directory, you submit your URL, usually for a small fee if it's a good directory, and a short while later the administrator comes by to approve you link. The thing that makes a bid for Position directory unique, is that the more you bid, the better your position is in the directory index. A great example of a bid for position directory is the famous bid directory. Notice this directory is listed alphabetically, rather than by category, and the top 6 bidders are listed on the homepage. This is a great way to increase your link popularity, and gain some additional exposure at the same time.