You can find many free traffic sources for CPA affiliate marketing from various sources online. You can start from Social media platforms which are great options. You can use Facebook, Instagram, X, Snapchat and Pinterest to drive traffic. You should join niche forum, groups and engage with members which potential leads by provide helpful contents and comments. Forums and discussion boards are also useful to drive traffic to you offer. Reddit and Quora allow you to share your links and answer questions but you have to do it strategically so that people will not see you as sales person. SEO is important to get free traffic as well You can optimize your blog or website to attract organic search traffic. Video marketing works well. You can create content on YouTube to promote CPA offers. You will need patience but these free sources can bring good results.