Offers, Promo Codes, and Card Promotions

An Offer owns the economic terms: trial, percentage discount, amount off, or temporary fixed price. Introductory Offers, direct Promotional Offers, Promo Codes, and Card Promotions decide how those terms reach a customer.

Channel	Who selects it	Additional rule
Introductory	Commet selects it from the plan price	New-customer eligibility
Direct Promotional	Your application sends `offerId`	Your application decides the audience
Promo Code	Customer enters a code	Plan, interval, expiration, and redemption limits
Card Promotion	Your application preselects `cardPromotionId`, or Commet discovers an auto-apply promotion; checkout verifies the card	BIN, billing interval, and Offer compatibility

Only one channel applies to the initial checkout. An explicit Offer overrides automatic introductory selection. A Promo Code cannot combine with an explicit Offer, and a Card Promotion must remain conditional until the entered card is verified. When terms are accepted, Commet stores an immutable Offer Application. Editing the catalog Offer changes future applications, not the phases already accepted by an existing subscription. See Offers and Card Promotions for setup.

Billing fundamentals

Subscriptions

Consumption and pricing

Payments

Offers, Promo Codes, and Card Promotions