One time discount for subscriber for Xmas

Hello Team,

We wanted to give a discount ( you can call it a gift card ) to our subscribers for Xmas.
We saw there is only an option to create a customized price, but we didn’t want to change the price but just to give like a coupon; how can it be done?
Because from what we understand, if we reduce the price, and then the price is increased, they need to confirm the “price increase.” We don’t know how often people visit C2, so we don’t want to affect the subscription charges.

We thought it could be a good channel to ask here as maybe other strategy leaders would like to do the same.