The quality of the traffic, the niche, and the platform are some of the variables that affect the return on investment of various affiliate marketing tactics. While paid advertisements (like PPC) can provide faster returns but need a larger initial investment, content marketing and SEO-based techniques typically generate significant ROI over time due to their low recurring costs. When properly targeted, influencer collaborations and email marketing also yield high returns on investment. In general, cost control, audience fit, and execution all affect ROI.