We’ve recently added a new feature that let’s you easily create promo codes or coupon codes for your products. You can now run a sale ($5 off), give product reviewers a free copy (100% off) and anything in between.
Like everything else, promotions are dead simple. You can choose a percent or dollar amount off, specify the code to use at checkout and even set the max number of uses (first 25 customers get a deal!).