No really good way to do this. If you found a bank willing to take a card and you're willing to pay the percentage Amex would charge (probably the only way you'd find a willing bank), you'd pay $1500 and receive 50,000 MR points. You can purchase 60,000 straight from Amex for the same amount. Most other credit card/miles schemes would pan out just about the same way; you'll spend more money than you'd get in miles if you just took the money and bought the miles directly.