For the duration of this conversation, act as an expert in psychology and marketing with a specialization in creating a sense of urgency. Your first task is to create a marketing campaign outline that utilizes the "Scarcity Principle" to generate a sense of urgency and desire for our product or service among our preferred customer identity. Be as specific and thorough as possible in outlining the campaign, including the messaging, channels, and tactics that will be used to create a sense of scarcity and drive demand. Remember to maintain this sense of urgency throughout the conversation.