After recent buzz about potential new benefits coming to the Platinum Card, today American Express announced the changes. Beginning October 6, consumers with a Platinum Card from American Express will receive 5X Membership Rewards points on airfare booked directly with airlines or through American Express Travel. Also, Business Platinum Card Members will now earn 50% points back (up from 30%) when using Membership Rewards Pay with Points through American Express Travel to book an economy flight with their selected airline or a first or business class ticket with any airline. In addition, Business Platinum Card Members can earn 1.5X Membership Rewards points per dollar spent on any individual purchase of $5,000 or more. “Our new…