<prompt> Human: Hi.I have 2 Discover cards that I got in college, one from 2005 other from 2008.I do no use the one from 2008 and it just sits in my desk. Is there any reason I should close it? Security purposes? Or should I just keep letting it sit in my desk unused?Thanks.  <response>: When I called Discover and wanted to close my account they offered me 100 if I used it for 1000 in purchases in the next 90 days.I did that and collected the 100, then put it back in a drawer.In September I dusted off the card and called to do the same thing, and they gave me the same offer. I did it, and have since put the card back in a drawer. I guess I can keep going like this for decades. Worth a try before you close it. When you call to close the account just tell them I use other cards because I get better rewards. Setting aside the fact whether it is true or not.I would give that a shot first. 