While it’s true that most of us respond better to advertisements that exploit our tendency for risk minimization over opportunity maximization, constantly choosing the fear-based advertising route can grate on your audience. While scarcity offers make sense from time to time, they can easily get overdone. If you do it often enough for long enough, it’ll likely create a negative association with your brand.
Much better to put in the hard work upfront and create intelligent advertisements that appeal to the customers’ imagination. Advertisements that help the customer visualize or understand how your product or service solves their problem and leaves them better off.