An affiliate network acts as an intermediary between the merchants and their affiliates. In some cases, a network is not necessary, but some companies choose to work with a network to add a layer of trust.
In a simple layman terms the affiliates show case the product of business which he is connected with and he get commission based on the agreement with the business. In this business model it is affiliates which have a greater role to play if he wants commission.

This is by far the best method that works for affiliate product promotions, provided you have a large list of subscribers. You can categorize your list on the basis of subscriber interest and send them affiliate’s promotional offers. When they click on the affiliate links in the emails and then buy those affiliate products with your affiliate link, you will get paid commissions. Collecting and establishing a huge subscriber base is a difficult task. An affiliate with a large email subscriber list base rakes in millions of dollars by simply writing promotional and effective copies to sell affiliate products to their subscribers.
Listed below are some affiliate programs that pay you ongoing money for as long as the customer you refer is there.