The Commission Junctionnetwork is a third party that connects you with thousands of advertisers and then pays your commission checks. This means you can join affiliate marketing programs (like eBay) within the network and place their advertising on your site. When someone clicks on an advertisement on your site and makes a purchase through your advertiser, you get a commission. CJ Advertisers can run pay-per-lead or pay-per-sale programs, or a combination of the two.