Building an email list means collecting addresses and sending regular messages, which adds work to site management. Some affiliates say email subscribers buy more because they already trust the recommendations. Others find that most sales still come from search traffic, making email feel like a side project. Offering something free to get people to subscribe can work, but it requires creating valuable content just for that purpose. Managing an email platform also costs money after a certain number of subscribers. The benefit might depend on the niche and how engaged the audience is. Have you seen better results from email or direct website traffic?