Here’s a brand new Amex Offer that is sure to be quite popular — once you register your eligible American Express card for this promo, you can earn a one-time $20 statement credit after you spend $20 or more online at SamsClub.com by September 30, 2015. Enrollment is limited and restrictions apply.

Note that if you aren’t already a Sam’s Club member, there’s currently an excellent Groupon deal on membership valid through May 4, 2015. Alternatively, non-members can still get a one-day pass to shop at Sam’s Club. As a non-member, you will be assessed a 10% service fee, however. (Not applicable in California, South Carolina, or Elmsford, NY.)

Enrolling in Amex Offers
To enroll in any Amex Offer, connect your card with Twitter, then tweet the appropriate hashtag. You can also see what Amex Offers are available to you by logging into your American Express account online or through other channels such as Facebook or the American Express iPhone app.

If you’re not already familiar with Amex Offers and want to learn the basics of the program–including how to sign up for offers–see this guide.

For example, to participate in this SamsClub.com deal:

1. Connect your card with Twitter
2. Log into your Twitter account and tweet #AmexSamsClub
3. Wait to receive a notification from @AmexSync stating that the offer has been added to your Card
4. Use your connected Card to spend a total of $20 or more online at SamsClub by September 30, 2015
5. Statement credit will appear on your billing statement within 90 days after 9/30/15 (but is usually much quicker)

Full terms of the promo can be found here. Note that this Amex Offer excludes phone orders, Sam’s Club Pickup program orders that are paid for in Club, Sam’s Club online photo purchases, Sam’s Club prescription drug purchases, Sam’s Club travel offers, Sam’s Club Payroll Services, Samsclubauto.com, Samsclubstationery.com, Samsclubchecks.com, Samsclubcontacts.com.

See all Currently Available Amex Offers
As always, to see a complete list of all public, currently available Amex Offers, see this page, which automatically updates whenever new offers are found.