Campaign promo codes are applied after clicking the Finalize Campaign button on the Create Campaigns screen.
To enter a promo code, just click the text that says “Have a promo code? Click here!” to reveal a code field.
Enter your code then click Apply.
If your promo code is valid, you will see your Original Total as well as your New Total.
Once a code is applied, your New Total is the amount that your card or another payment method will be charged.