Rejected For Office Depot Card

Yesterday I received another rejection notice, this time from the Office Depot credit card I was trying to get. Again, I'm not too concerned about this, since I won't really be needing credit anyway. I still have not heard back from the cashback credit card offer I sent in a while ago. I'm thinking I'll get it because I believe I had to offer a personal guarantee of financial responsibility on that one. These other two cards I did not (but I was given the option to).