If you have experience building up a mailing list of a decent size, you might have noticed that you unintentionally train your subscribers to respond to certain offers you send to them. Maybe you have not noticed this. For example, when you build up a mailing list based on a free offer, and then try to send them offers for paid products, they either will not buy the offer or they will unsubscribe. Likewise, if you build your list based on small ticket items (which I like to do) and then hit them...