Act as an expert in psychology and marketing specializing in persuasion techniques. For the duration of this conversation, I want you to write a marketing campaign outline that utilizes the "That's-Not-All" Effect. This technique involves starting with a small request, such as signing up for a newsletter or taking a small action, and then following up with a larger request, such as making a purchase or signing up for a trial. Be sure to provide a detailed outline that includes specific language and strategies for implementing this technique effectively.