Final answer:
Effective sales message motivators include a gift, the promise of an incentive, and a money-back guarantee as a promise of quality, especially for online and mail-order businesses. Unauthorized celebrity endorsements should be avoided, and an open deadline may diminish urgency.
Step-by-step explanation:
When considering what motivators can be added to a sales message, it is important to adhere to legal and ethical standards to ensure the effectiveness and integrity of the message. Incorporating a motivator like a gift or the promise of an incentive can be effective as these offer tangible benefits to potential customers. A money-back guarantee is another possible motivator which serves as a promise of quality, and it is particularly compelling for businesses that operate online or through mail-order, as it provides assurance for customers who cannot physically inspect the products before purchase.
On the other hand, options like an unauthorized celebrity endorsement are neither ethical nor legal and should be strictly avoided. An open deadline could be used, but its effectiveness as a motivator may vary and it carries the risk of losing urgency in the sales message. Following up with potential customers who haven't initially responded to your campaign through a pleasant and persistent approach can also be an additional motivational strategy.