That's a good way to look at things. I sometimes buy things I don't need just because I save 5%. I wonder how much less I would spend if I didn't have that discount...Same!
My credit score is great and I was turned down for the cc (though they used equifax and I haven't looked at the equifax report in over a year). I reopened my target cu account though so I'll probably transfer money there when I use the discount. The redcard 5% is not worth the trouble. I've saved so little this year and when I think about it, I wouldn't have bought a bunch of stuff to begin with if I wasn't thinking about potential discounts. That 5% becomes an excuse more often than I'd like to admit