I sell about $100 worth of software for every ten people I can convince to click on a link in an email. That number astounds me. I hope to do more with it next year.
To expand, that means that if a user's average lifetime clicks is .5, an email sign up is worth $50 in eventual revenue.
I have worked with clients (retailers) on their numbers and found that a subscription (pen, paper and a person asking a couple of questions) is worth more than a sale.
