THE 4 TYPES OF SCARCITY. In order to have a compelling and effective online offer, you should absolutely be including some form of scarcity in your sales messaging. FOMO is the real deal and is the precise reason we use scarcity in sales and marketing strategies. It gives your prospect a reason to buy NOW, because if they don’t, they could miss out. There are 4 types of scarcity that I frequently use in my sales offers and, in this video, I’ll reveal each one.