Clearly the reason they want to wait 30 days is so that you don't cancel the subscription. Solution: buy multiple magazines < $400. They post in two days. Probably two weeks to transfer to miles. Then cancel subscription before 30 days are up. Wow free miles. Don't let you cancel? Call credit card company to get chargeback. Worst scenerio? They take away your miles. Best scenerio, they let you keep them. I know someone got 20+million this way...