If you're looking to increase footfall to your venue, perhaps during quieter times, creating a discounted or value-added card with a short-term expiry date can work a treat.
Here's how to create this offer.
Step 1: Create a card and assign a specific expiry date (e.g. August 31st)
Go to Products
Select the Gift Card option
Name card something enticing e.g. 'The August special'
Assign specific expiry date
Step 2: Create special offer promotion
Go to Promotions
Click Add promotion
Select the Special Offer option
Select Added value and fixed value options
Select end date as the same as the card expiry date, or a few days earlier to allow some leeway
Now you've set this up, on your webshop a green label that highlights your special offer is there for anyone to see when they see that card. Shout about your promotion on social media and on your website to increase its exposure - emphasise that it's available for a limited time only!