Affiliate marketing is also called "performance marketing", in reference to how sales employees are typically being compensated. Such employees are typically paid a commission for each sale they close, and sometimes are paid performance incentives for exceeding objectives. Affiliates are not employed by the advertiser whose products or services they promote, but the compensation models applied to affiliate marketing are very similar to the ones used for people in the advertisers' internal sales department.
The only difference with the offline middleman and affiliate business program is that the online affiliate does not need to get hold of the actual product to earn revenue. He doesn’t need to shell out money to buy the product that he has to sell. All he has to do is create a site that markets the products of the producer. Every time he makes a sale, the producer will take over to send the actual products, receive payments and extend customer support, when necessary. A special web-based script records this process and thus the affiliate is paid for every successful sale he makes.