Type of Income / Revenue Affiliate Program

In the affiliate program there are several types of payment, from the smallest to the commission the largest. You can choose one. 

1.   PPS (Pay Per Sale). You get a commission for every person you buy the product referencing affiliate program owners / merchants. Commission that you get only when the potential prospects / buyers to buy products for your recommendation. You will not get a commission if the sale does not occur. 

2.   PPL (Pay Per Lead). You can get a commission if the person you referencing be "free member" or potential prospects from affiliate programs. Usually people who become free member will be a newsletter from the merchant. If they buy a product, you will get commission had PPS.

3.   PPC (Pay Per Click). You will get a commission if someone clicks on a merchant ad. To run you need a PPC blog / site. PPC famous example is the google adsense. 

For examples of the provider / merchant PPS, PPL, and PPC you can find yourself via google. Remember, self-learning. Before you follow the affiliate program, I suggest you learn first merchant /the  provider to see TOS and FAQ.