The web page will never expire and will always be up.   The CAMPAIGN dates however, is what determines whether or not a customer can claim a code.   The Start Date and End Date on a campaign are determined by you, and is the only time a customer can claim a code.   If a customer attempted to claim a code outside the campaign range, they will receive a message indicating it is not currently running.   We leave the website up forever in case you ever wanted to restart the program after some time, that way your URL remains the same.