It's free and easy to sign up, so why not. Every time you go to Borders, you show them your Borders Rewards card, and they scan it with your purchase.
But what does this actually do?
First, you have to make sure it's a Qualifying Purchase. Qualifying Purchases are purchases you make that qualify for Borders Bucks accrual. It has to be in a participating store, and it can be anything they sell (excluding purchases of gift cards and gift certificates, online transactions, or any transaction that involves Group Savings and Services or Teacher/Classroom discounts). Then you can get your Borders Bucks.
And what are Borders Bucks?
Well, whenever you spend any money at Borders, it is entered into your Qualifying Purchases balance. When you spend a cumulative amount of $150, you earn 5 Borders Bucks. Those bucks are only available to you in the month FOLLOWING the month in which they were earned. When that month is over, the 5 Borders Bucks go away. What if you reach the $150 in Qualifying Purchases and you get the 5 Borders Bucks, but you're not aware that it's even there? Then you don't get it. You have to catch the next one. Which will no doubt be easy, considering how everyone can afford to spend hundreds and hundreds of dollars at Borders all the time. But you better be careful, because at the end of every calendar year, your Qualifying Purchases balance, wherever it's at, gets reset back to zero. Why? So it will be harder for you to get Borders Bucks.
If anything, this actually makes me want to shop at Borders less.