The whole point of affiliate marketing (or any other business in fact) is earning money. If they successfully promote the merchants product, the affiliates will receive money. Still, in some cases, they wont be allowed to actually get a hold of that money until it reaches a certain amount. The minimum accumulated commission that affiliate partner needs to warn in order to be able to receive a payment is called the payment threshold. The amount differs depending on the affiliate program. For example, the payment threshold at Google AdSense is 100 dollars earned by the end of the billing month.