This module and component will allow webmasters to join your referral program. When they fill the form, and you approve their site, you email them their site ID. They create a link to your site using the format: http://yoursite/index.php?siteid=their site id that you give them. When people click on that link to visit your website, the webmasters ID that was used gets a point. Remember to grab the Component as well.

  Joomla! Site Exchange Module (1.2 KiB, 278 Downloads)