The diverse array of companies involved in email marketing ensures that no one party can make changes that would have a widespread effect, and unlike Facebook or Twitter, if you invest the time and money into building and cultivating a great email list, your subscriber list will be an asset you own. Thus you’ll be able to leverage your list without the threat of someone limiting its effectiveness.
1. New vs. existing customers. New customers traditionally have higher lifetime value than existing ones. This is because every new customer grows your customer base. And once you own the customers, you pay less to convert them on future purchases. Customers who have purchased from you already know your product, value your service, and presumably trust you. It costs more to acquire a new customer because you have to build that credibility and trust.
At the beginning, Murphy created her own affiliate program in house. She found that this process was a major time sink — she had to take the time to constantly monitor her program and remember to pay affiliates regularly. She made the jump on an affiliate network, where she could immediately access tracking, reporting, and payment systems (as well as instant access to affiliates who were more-than-ready to help sell her products).
Emails triggered by milestones, like anniversaries and birthdays, are fun to get -- who doesn't like to celebrate a special occasion? The beauty of anniversary emails, in particular, is that they don't require subscribers to input any extra data, and they can work for a variety of senders. Plus, the timeframe can be modified based on the business model.