Drupal: Recycle Ubercart coupons
This CodeLet recycles coupons created using Ubercart coupon module. The CodeLet chooses a coupon randomly from the available active coupons and send an email with coupon details to respective users. The coupon is remain active uintil defined period and then expires. This CodeLet, when cron runs, activates those coupons and those can be used again.