Feature Request: More Flexible Subscription Management Tools

[riceka]

Re: native subscription/payment plan functionality

Would love to see more midstream flexibility in subscriptions, such as the ability to:

• Adjust pricing or remove discounts from active subscriptions
• Modify individual line items within a multi-part subscription
• Support per-unit logic for subscriptions (e.g., when only one traveler in a two-person order qualifies for a loyalty discount)
• Apply or revoke discounts after the initial order, based on verified eligibility