theoretically it may affect your credit scores; however, in my experience, it does not make a big difference. I've canceled a couple of credit cards, when I apply a mortgage, I still got a good rate.
not bad. ; u& g0 y; A, R- m2 j: P# A' m a; b7 f$ z; a
but compared with other rewards cards, the rate of getting points is not good enough. But if you buy things a lot at their stores, it is very good.