ClickBank

ClickBank is the online distribution center for over 10,000 digital products and services that are delivered entirely over the Internet itself (via web pages, files, or email).

Web businesses with digital products to sell (vendors) give access to their product and place a special "Buy It" button on their web site.

Products are promoted through a network of over 100,000 online marketers (affiliates). Each vendor selects an affiliate commission percentage for their products in advance. Affiliates promote the products, and refer interested customers to the vendor's web site. The vendor's web site explains the product, and refers customers directly to buy it. ClickBank makes the sale, pays the vendor, and pays the affiliate.