There is an addon here that will automatically add your Amazon affiliate ID to any amazon link. It only gives anyone who use the link a 24 hours cookie. This means that you won't receive any commission if your visitors decide to buy it after 24 hours. However, you can change the affiliate link into direct shopping cart link that will have 90 days cookie. https://affiliate-program.amazon.com/gp/associates/help/t1/a10 It would be great if anyone knows how to change the current addon to automatically change any copy and paste amazon link into a Add-to-Cart link.