Affiliate programs usually pay commissions in different ways, and two common models are CPA and CPS. CPA means Cost Per Action. In this model, the marketer earns money when a visitor completes a simple action such as signing up for a free trial or filling a form. CPS means Cost Per Sale. Here, payment happens only when a real product purchase is made. CPA can bring faster results, while CPS may pay higher commissions per sale. Which payment model seems easier for beginners learning affiliate marketing?