Have you considered using coupons as part of your Twitter Marketing Strategy?
TwtQpon lets you create coupons for promoting your products or services and then post them in your Twitter feed as part of your. If you have products or services you want to promote to your Twitter followers, consider offering a small discount or incentive in the form of a coupon and take advantage of the viral / retweeting features of Twitter.  TwtQpon says: ” Enhance your social media marketing by offering discounted coupons to the Twitter-sphere!”
See a sample Twitter coupon …