The most popular, and usually best sites are listed at the top of the list. Please see the rules page . In is the number of visitors you sent to the list, these count as votes for your site. Out is the number of people who have gone to your site from our list. This is to make the list fair to new users and to get rid of inactive accounts.
Some people sign up but never add the code to their site, thus they never receive any votes.
You need to add some sort of link, text or graphic, to receive votes. Sites with no votes for extended periods will be considered inactive and may be removed from the list. Go to the list you want to add your site to from the main menu and click on the add your site link. Sites will not appear until the database is updated, it is automatically updated every few hours. Check back in little while.