I've been building a list for a while and would like some ideas of how to keep from annoying my customers. You see, I'm selling a product and have about 7 followup messages marketing this product. The problem is, when someone purchases the product on followup message 1 through 5, they still get followup emails asking them to buy something they're already purchased!
In the past I've attempted to have them sign up to a customer list on the download page, but not all of them signed up. Should I force them to sign up to another list before they get the download?
Any ideas would be appreciated.