The coupon is only available using the Bricks coupon printer. That program generates a unique bar code and serial number for each coupon to make sure they are originals, not photocopies and limits the number of coupons you can print from a single computer.
You don't have to install the bar, just the coupon printer program. Unfortunately, you cannot print them if you haven't installed the coupon program. So, you may be unable to print them from a library or work.