Please check your email. This deal is most likely targeted due to only receiving an unique code.
For your reference, I received this email today.
Unknown expiry, not listed in the email. Hence, if you have this, perhaps buy a Gift Card when you have the chance to as it's 5% off.
Email Contents:
Hi friend. It's been a while since you've gifted with Prezzee.
Because we love to give as much as you do, here's $5 off your next Prezzee Smart eGift Card* purchase of $100 or more! You can now gift (or buy for yourself) and save!
Your unique promotional code: AU5OPXXXXXXXXXXX
Received this email a few days ago. Used to trade grocery cards. Their smart giftcards are the only ones that don't suck so much these days lol