Why are subscriptions, pre-made rituals, and 'Build Your Own Rituals' excluded from sitewide promotions?

Subscriptions automatically save you a set percentage on every recurring order, plus free shipping.  Pre-made Rituals are bundled at a special, lower price compared to buying the items individually. Build Your Own Ritual features an amazing tiered reward system built right into the builder. Once your bundle hits the $50 threshold, you unlock 10% off. If you keep building and hit the $100 threshold, you keep that 10% off plus you get to select a free item right inside the ritual builder, and free shipping?