The campaign is to accelerate, the consumer purchase decision. If you have time to set campaign period, as consumers rushed to purchase stimulation because they fear it will give the temptation.
The campaign is urging consumers to buy them. If you have a set time during the promotional period triggering a consumer rush to buy. Deadline for fear the temptation is.
Sales promotion is the accelerating consumer decided to buy it. If there is a set time period promotion stimulates consumers rush to buy? Because I'm afraid deadline of temptation.