Because it's a premium rewards card, the Amex Platinum Card is harder to get approved for than some other popular cards. Amex will look at your credit score, income, and other factors when it considers your application. Keep in mind you won't be eligible for the welcome offer if you already have, or have had, the Amex Platinum Card because of Amex's once-per-lifetime rule. However, if you have/had another version of the Platinum, such as The Business Platinum Card from American Express, you're still eligible for the bonus.