Yogen Früz has just put up a new offer on their Twitter for the holiday season for a free $5 gift card when you buy $20 worth of gift cards.
No information on when this expires, but this was just posted today and is for the holiday season, so it should be good through December.
The Fine Print
Conditions may apply. Ask in store. While supplies last. May not be combined with any other offer. At participating Yogun Fruz locations including cinemas and mini stores.