Unit economics describes the revenue and costs associated with serving a meaningful unit, such as a customer, order or subscription. Define that unit before comparing figures across products or channels.
Separate variable delivery costs from fixed operating costs and state how discounts, refunds and support are allocated. Compare acquisition cost with contribution margin and retention. Revenue growth can conceal negative contribution when delivery costs rise with each sale.
Use cohort data where it is available and label estimates where it is not. Run scenarios for price, retention and service effort. A promising unit margin does not remove the need to cover fixed costs or fund the time before customers pay.
Open Sources Used
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Reading adjacent decision areas keeps the topic from becoming an isolated note.