An incentive is more than a tough sales campaign.
Incentives as a motivator are easier to use for a broader cause. An incentive can be implemented on every platform where a group of people is being perceived in a playful way to enhance their performance.
A good incentive campaign will pay itself back. The costs of a campaign have to show added value in extra revenue. (or better service)
It has been proven that the long term effect is much greater than a financial reward.