<prompt> Human: I assumed it was more like a typical store membership card, where you get small discounts and perks, but it turned out to be a full on credit card. I was approved for a 4000 limit. After I realized my error, I did some research and found out that this card is pretty bad and the few perks of it do not even apply to me. I just received the card in the mail, but I do not want to use it. I really hope it does not affect my credit too badly, especially because I am looking to increase the credit line of my actual credit card soon.So should I cancel it or let it die on its own? I read that it will be cancelled after some time if I do not use it. I just hope there isnt some annual fee or something. From what I understand, having another 4k in available credit would actually be good for my credit, right?  <response>: Whatever damage opening the card has done is done.Just keep it open.My HD card in Canada sometimes gets me some decent 10 off over 299 deals. It might come in handy at some point. 