If you are looking to build an email list, and want to be able to use custom variables in the emails that you send out, then this guide is for you. Here are some example use cases: Tag subscribers to affiliates, so that you can add their Clickbank hop ID to all your links, in all your future email broadcasts/autoresponders Track total revenue based on where you acquired a subscriber. E.g. track Google Analytics variables by appending them to all …