UPDATE 9/8/23:
Don’t forget about points expiring next 7/1/24. A little trick to get BOTH a free whopper w/points AND the free large fry weekly offer on one order (if not getting a drink)
Add the fries offer/large fries and a whopper. CUSTOMIZE the whopper to have heavy tomatoes or lettuce for an extra 15c. Go to payment screen, click the 'USE 750 rewards" option for the Whopper. Your total will be 15c + tax.
If you have a $0.00 balance it won’t let you order the free fries as it requires a payment of at least .01 on something on the order.