What are CPA Affiliate Programs?

CPA Affiliate Programs
are also named as Cost Per Acquisition Affiliate Programs, or Cost per Action Affiliate Programs.
These type of Affiliate Programs are most popular among gaming sites and other merchant sites where users return often to the site to make the desired action and the value of the customer is considered high enough so that the advertiser would prefer not pay the affiliate commissions for each transaction of the user, but instead pay a one time high enough fee for each new user that performs a desired action on the site.