A re-inclusion request can positively impact the SEO of an affiliate site, especially if the site was previously removed or penalized by search engines like Google. When a site is excluded from search results due to policy violations, poor-quality content, or algorithmic penalties, submitting a re-inclusion request after addressing these issues signals to search engines that the site is now compliant and improved. This can restore the site's visibility and organic traffic, crucial for affiliate marketing success. However, the effectiveness depends on genuine improvements in content quality, user experience, and adherence to SEO best practices.