Thanks for the post! Yes, discounts can be applied to certain Gift Card products. There are some specifications however. You can create a discount that decreases the cost of a gift card in the following ways:
By a specified percent, such as 20% of the gift card’s face value
By a specified amount such as $20 off the gift card’s face value
Also, as with discounts in general, the following restrictions still apply:
You can have only one active automatic discount at a time.
Automatic discounts take precedence over discount codes and can’t be used at the same time.
Customers can’t apply multiple discounts to a single order.
Discount codes are not available to customers who have an automatic discount applied to their checkout.
As far as a custom note, you can do this by navigating to Settings > Notifications > Gift card created. From there you can edit the HTML to include a custom message.
Hope that helps! Let me know if I can clarify any of that for you.