How to set up a monthly discount for a year-long giveaway?

[Logoplata]

Hello, I am in prelaunch right now and am planning on doing a giveaway for a year supply of the product. My question is on the discount. I can see how to make the discount apply for specific items, price, and time frame. I do not see how I can set it so the discount can only be used once per month. I was thinking I would have to send them out a discount monthly for a year. Any suggestions on how best to accomplish a discount that applies for 1 year, is only usable once per month, is 100% off of select items? Thank you. 

[tobebuilds]

Hi, I'm Tobe, the developer of Regios Automatic Discounts.

With Shopify's built-in discount codes, you can create discounts that:

• Apply for 1 year (set the end date 1 year from now)
• Give 100% off select items
• Is only usable once per customer.

If you do so, then you're right - you would have to create a new discount code once per month, and send it to your specific customers who won your giveaway.

Each new discount code would probably need to have an end date 1 month into the future, and have a once-per-customer usage limit.

As of the time of this writing, automatic apps can't limit usage to once per customer. Otherwise, they would have been a good option.

I'll keep you updated if I ever add the functionality you're looking to your app.