How they work
If you're part of a program where participants were given an advertising coupon, you first must add a credit or debit card to your X Ads account. Then, make sure you're logged into the Twitter account you want to add the coupon to, and click the "Add coupon" link in the coupon confirmation email you received.
Your payment card will be automatically charged for any amount your campaigns serve over the amount of the original coupon credit. Your advertiser coupon funds will always be charged first before your payment card.
To help manage your advertiser credit, we will send you an email when your ad credit is close to 80% exhausted. To view your total billable activity to date, navigate to "Spend metrics" > "Budget" on your ads dashboard.