I am wondering if anyone knows how to build (or if there is some software out there) that will make a link expire after the user downloads it once.
Here's what I'm trying to do:
Send all my customers and email with a 50% off coupon. Once they have downloaded and printed it once, the link expires (perhaps based on their IP address?) Basically I am trying to prevent them from printing and downloading a coupon for all of their friends too!
Your comments and suggestions are appreciated.