Like other payment networks, American Express is juicing up its rewards program for the holiday season. The “Membership Rewards” promotion runs from “Black Friday” (November 27th) through “Cyber Monday” (November 30th) for eligible “Charge Card” users to receive triple “Membership Rewards” points. In addition, American Express is offering a limited-time promotion that allows “Platinum Card” holders to earn six times the “Membership Rewards” points and American Express “Gold” and “Green” cardholders the opportunity to earn five times the points when they shop at a selection of 25 popular online retailers. Through the “Bonus Points Mall” site, “Platinum” cardholders can also continue to earn four times the “Membership Rewards” points, while AmEx “Gold” and “Green” cardholders can continue to earn three times the points on all purchases made at more than 250 participating online stores. “Charge Card” holders continue to have the opportunity to enroll to earn double points on gas and grocery purchases nationwide, up to $1,000 each month, through March 15th.