Many people do not take advantage of an opportunity to stay connected with people they are marketing online to with single campaigns. Some of the prospects most likely to respond to future offers are those who are willing to give you their email address for a newsletter.
Always be creative in ways to capture new names for your list. It has been said that the money is in the list. A list has to be properly managed and promoted to, but without a list you have no one to market anything to.