Single code that applies multiple per-SKU discount tiers (per-product rules) for exclusive customers

Use case: allow creating one Advanced Discount Code that, when entered at checkout, activates multiple independent product-discount rules with different discount amounts for different SKU groups (for example: SKUs in group A = 10% off, SKUs in group B = 20% off, SKUs in group C = 35% off). Each product rule should allow percent or fixed discounts and optional minimum quantity per product rule. The merchant intends to distribute the single code via Mailchimp to an exclusive customer list. Requirements: support multiple distinct product-discount rules within one code, ensure the single code activates all relevant per-SKU discounts, support optional scheduling (start/end dates). Note: do not include usage limits or internal customer-segmentation enforcement in this feature request (merchant will handle distribution via Mailchimp).