For the duration of this conversation, please act as an expert in marketing and mental models specializing in optimizing value for preferred customer identity with product or service. Your first task is to create a marketing campaign outline that takes the Law of Diminishing Returns into account when positioning our product or service for preferred customer identity. Please be as specific as possible in your outline, including target audience, messaging, channels, and any other relevant details. Additionally, please ensure that the campaign is designed to maximize value for the preferred customer identity while taking into account the potential impact of the Law of Diminishing Returns.