They stated the reason to keep it open, is it will hurt my credit severely if I closed it.
First thought: Who's "they"? I think you mean the credit card company -- the very people who are making money off of you. Wouldn't they say whatever's necessary to keep the money flowing in their direction?
Second thought: Just how much is "severely"? That's not a quantifiable number. Ask them -- better yet, investigate online -- exactly how much it'll hurt. If this isn't your only financial account, I suspect it'll hit your credit score, but it won't be nearly as bad as the credit card people want you to believe. Make financial decisions based upon math -- not vague descriptive words.
Final thought on the original question: Never make financial decisions based upon your credit score. Your credit score measures how well you pay your debts.
It is NOT a gauge of your financial security. You could be in tremendous debt, but as long as you pay the minimum every month, you're going to have a good credit score. Case in point: years ago when we were buying a car, and we were deciding whether to pay it in cash or finance a portion ... the guys at the dealership ran our numbers, and they came back saying, "We never see this: you have not just a good credit score, but a perfect score." A couple years later, we paid off our mortgage, and our credit score dropped. Since that time, it has never been perfect again; by paying off our house /becoming MORE financially secure, our credit score dropped. It was an eye-opener for me, and it made me realize that if you're focusing on the credit score,
you're taking your eyes off the real goal.
That real goal should be financial security. Live beneath your means. Constantly look for ways to lower your expenses. Put money into savings every single month. Maintain an emergency account. Work towards being debt free, including cars and your house. Create a plan for the kids' educations and funding your retirement. If you do these things, you will have REAL financial security ... and your credit score will fall into place.
But, yes, the "I love credit cards.." thread is great and has tons of useful information with many friendly people who give great advice. They will all tell you the same - pay your balance in full, otherwise the rewards game is not worth playing.
Absolutely. Never, never, never carry a balance. The cost is quite high -- typically 18-24% per year high. No, those rewards are not worthwhile if you're paying interest.