I used cards all the time UNTIL I was buying gas and the card was declined, and yet again at the grocery store, made me feel like an idiot, there was no balance on the $5000 credit limit, they closed the account because I hadn't used it for a while and didn't let me know. I closed three accounts as soon as I got home, I keep one that I use for gas at least once a month they can keep the rest..
Credit card company's aren't in business to make sure your purchases are covered if fraud is evident or to give you money back, they sit and wait for an emergency high dollar item that you need immediately and don't have the money for and probably wont be able to cover within 20 days. It's a matter of time before that happens and they know it..
People have ups and downs through life, credit card company's wait for the downs and then give you a swift kick in the you know what as soon as the card holder is at there worst, nice people they are..