Smart Coupons for WooCommerce

Hi,

I’m currently using Smart Coupons for WooCommerce. It works for most of my needs, but I’ve run into one limitation and I’m wondering whether a new feature can be made.

I have three separate single-item products (Item A, Item B, and Item C). A coupon provides 50% off these products.

The coupon already works as intended for:

* One use per customer account.
* Only applying to these three eligible products.

The requirement I can’t achieve is this:

The coupon should apply to only one unit of each eligible product, regardless of the quantity purchased.

For example:

* Item A × 5 → only 1 receives the 50% discount.
* Item B × 3 → only 1 receives the 50% discount.
* Item C × 2 → only 1 receives the 50% discount.

So, if a customer purchases:

* Item A × 5
* Item B × 3
* Item C × 2

only three items in total should be discounted at 50%—one Item A, one Item B, and one Item C.

Likewise, if a customer purchases only:

* Item A × 5

then only one Item A should receive the 50% discount.

The products are separate products (not variations), so the limit needs to apply per individual product, not across the cart as a whole.