Store Credit Cards...Are they really as good as they seem??

http://moneycentral.msn.com/content/Banking/creditcardsmarts/P135858.asp

This article talks about those cards that you see at basically every store you ever go to. They are usually at the register when you check out and might be advertised like the following...Gap Credit Card: Save 10% on today's purchase and every Tuesday. They always seem appealing, and you are usually enticed to sign up when the cute girl behind the counter smiles at you, knowing she's getting commission off of it, and asks you if you want one. However, is the customer really getting a good deal? Though most people judge a book by its cover, and don't realize the harms of these, there are actually a great deal of downfalls that come with these cards. They run at extremely high interest rates, and can even devalue your credit history, something not very helpful when applying for that real credit card. My question for you is this...Do you think that these cards are actually hurting our economy. After all, it has been proven that people spend more if they have a credit card than if they only have cash. Thus, more peopling find themselves in debt. Just a thought.