Quantity discount
Tiered pricing such as Buy 1, Buy 2, Buy 3.
Offers
Offers add extra products or discounts around the COD order form. All four types share the same setup shape: a General tab for naming and targeting, an Offer tab for the content, and an Appearance tab for styling.
One-tick upsell
Shipping protection, gift wrapping, or a linked product.
Post & pre-purchase upsell
Show it right after checkout, or just before.
Downsell
A last-chance discount when someone closes the form.