How to keep track of your Marriott's gift cards?

Marriott has been selling its gift cards at a discount from time to time and Amex also has some good offers for you to take advantage of, like spend 250 dollars at Marriott properties, get 50 dollars statement credit, which have expired though. But by stacking up Amex discover offer, basically you could buy 250 dollars Marriott gift card and get 100 dollars(50 dollars +50 dollars statement credit) back, it's like 40% off. So if you have multiple Amex cards, you could potentially rack up a few Marriott gift cards. There is an easy way to keep track of  these cards. You just need to go to this web site: https://gifts.marriott.com/login/

At the bottom, you click"create account" to register your gift cards information. Once you have registered it, you will see the card balance, status and  and recent card transactions,  etc.

Amex's discover offer will be expiring soon. It's basically 20% off if you spend 250 dollars at any hotels. So take advantage of it if you can.

In the meantime, Amex US Marriott Brilliant card has a new offer of spending 200 US dollars and get 50 dollars credit, which is slightly better; 25% off. It will end on Dec.31st, 2021.