I just learned this yesterday but you can earn points on your SYWR card at places other than Kmart. Like Burger King, giftcertificates.com, HEARST Magazines, 1800flowers.com, etc.
You can find more details and deals here.
I love my SYWR card. This year so far, I've already cashed in $75 worth of points and it's only April. My birthday month is in June and because I'm a gold member, I'll earn 10% in points on all my purchases that month at Kmart, Sears and their online stores/affiliates. Last year. I earned nearly $100 worth of free stuff just by using my card during the month of June.