Which discounts are published

The rule

Only discounts that are live right now are in the data. Then:

Discount	In the data?
A DiscountOS automatic discount	Yes, unless you tag it dos:unpublish
A DiscountOS discount code	Only when you tag it dos:publish
Shopify’s own discount, automatic or code	Only when you tag it dos:publish
A discount made by another app	Only when you tag it dos:publish
A DiscountOS discount that works only in your physical stores	Never, it cannot apply to an online order
A DiscountOS discount in test mode	Yes, marked test. Your theme should hide it from shoppers. See Filtering.

A scheduled discount is not in the data before its start time. An ended, expired or turned-off discount is removed.

Where to add the tags

For Shopify’s own discounts and other apps’ discounts: open the discount in Shopify (Discounts in your admin) and use the Tags card on the right. Add dos:publish and save.

For DiscountOS discounts: use the Tags field in the discount’s form in the app.

How long a tag change takes

Shopify does not always tell apps when a discount’s tags change. Tags changed from Shopify’s discount list or through the Admin API (tagsAdd, tagsRemove) send no notice at all. So DiscountOS checks your discount tags every 2 minutes, and a tag change shows up in the data within about 2 minutes, wherever it was made. Press Manual sync to apply it right away.

See what is published from Shopify and other apps

The Native discounts tab on Manage discounts lists every published discount that DiscountOS did not make, with a button to open it in Shopify.

Which discounts can be the best value

The best-value keys (max_reward_percent, max_reward_cents, max_reward_discount) are picked from your DiscountOS discounts and Shopify’s own together; discounts made by other apps never count. The highest value among the ones that count wins.

Discount	Counts towards the best value
Automatic, amount off (a percent or money), for every customer, on one-time purchases	Yes, when DiscountOS or Shopify made it
A discount made by another app	No
Buy X get Y	No
A discount code	No
A discount limited to some customers, markets or conditions	No
Free shipping or a free gift	No
Test mode	No

Your theme can still show every discount from the discounts list in its own way. The rule above only decides which one fills the ready-made best-value keys.

Limits

Limit	Value	What happens past it
Automatic discounts in the data	30	Nothing is written and the previous data is kept. The Storefront data line tells you how many to remove.
Tagged discounts (dos:publish)	30	Same as above.
Products written through Publish to collection products	8,000	Discounts and collections still sync; the products do not. The line says so.
Active discounts carrying any dos: tag (including dos:unpublish)	2,500	Nothing is written and the previous data is kept. The line asks you to remove the tag from discounts that don’t need it.

Shopify's own limit

Shopify allows at most 25 active automatic discounts per store, and that count includes app-based discounts (Shopify Help Center). So in practice the automatic limit you meet first is Shopify’s 25, not the 30 above.