Recently, I have been giving much thought to applying for a Discover Platinum Card. I received an offer in the mail a few weeks ago and then I trashed it later in the day. Then I started thinking about the Cash back reward plan that they have, 1% if you spend over 3K/yr, .25%/1k/yr .50%/2k/yr, .75%/3k/yr. I have a Amex Blue and a Citibank Platinum, both prestigious cards, I love them. I was thinking about applying for the Discover Platinum and and putting all of my purchases towards the Discover so I can build up a bonus at the end of the purchase year. But lets say you spend $4000/yr and you get a cash back bonus of 1%, that equals: $40 which they would mail you a check for, free money. It sounds good, but I don't know if I should stop using my Amex and Citi and just switch over to Discover entirely. Is there anyone else out there who is in a situation such as the one I am faced with? If so, please reply back. I want my credit report to stay in good standing. Having many accounts listed as open and closed in effect makes your credit report seem sub-par, which is exactly what I don't want. I only have 2 open accounts, and I am wondering whether or not the Discover card would be a nice addition to my credit history. Mind you, I once had a Classic Discover card but I cancelled it, never used it because, I just don't know, I just used MC/VISA instead probably because of acceptability of these cards at more locations than Discover. I need help. Should I stay just as I am right now and build many years of credit history and good scores with Amex and Citi or should I invite another contender into my credit world which if I did, would utterly shut down my main 2 accounts primarly because, of the cash-back, free money program. The more you charge on that particular card, the more you get back, everyone likes that.