To effectively promote VPN affiliate offers on social media, create engaging and informative content that highlights the benefits of using a VPN, such as enhanced privacy, security, and access to geo-restricted content. Share relevant news articles, tips, and insights related to online privacy and security to establish yourself as a knowledgeable source. Utilize eye-catching visuals, such as images and videos, to grab your audience's attention and drive traffic to your affiliate links. Engage with your followers by responding to comments and messages, and consider running social media contests or giveaways to incentivize VPN signups.