Yes, it is possible to fail in affiliate marketing. Like any other business venture, affiliate marketing requires hard work, dedication, and patience. There are several reasons why an affiliate marketing campaign may not be successful. For example, the chosen affiliate products may not be in high demand or relevant to the target audience, the marketing strategies used may not be effective, or there may be too much competition in the market. Additionally, affiliates may not have a clear understanding of their target audience or may not have a well-defined marketing plan. To increase the chances of success in affiliate marketing, it is important to do thorough research, choose quality products, and use effective marketing techniques.