How does the usage limit of promo codes work?
Usage limit of promo codes refers to the number of times a promo code is applicable throughout all purchases.
For example: If the usage limit is set to 5, the promo code will be applicable for 5 purchases (irrespective of the number of tickets added).
Once the usage limit gets exhaused, it will not be applicable any longer and users will get relevant error message if they try to use it.
As an admin, you can update the usage limit to make it usable again. To know more about updating promo codes refer to Modify Promo code