The value delivered by a product can not be determined by revenue alone, because:
* Revenue is only one aspect of value, and it may not reflect the true impact or benefit of the product for the stakeholders, the users, and the society. For example, a product may generate high revenue, but also cause environmental damage, ethical issues, or customer dissatisfaction.
* Value is a subjective and relative concept, and it may vary depending on the context, the perspective, and the criteria of the evaluation. For example, a product may have different value for different segments of customers, or for different markets or regions.
* Value is dynamic and emergent, and it may change over time due to various factors, such as feedback, competition, innovation, or regulation. For example, a product may lose its value as new alternatives or solutions become available, or as customer needs or preferences evolve.
References:
* Scrum Guide 2020, page 6: "The Product Owner is accountable for maximizing the value of the product resulting from the work of the Scrum Team."
* Scrum Guide 2020, page 11: "The Product Goal describes a future state of the product which can serve
* as a target for the Scrum Team to plan against."
* Scrum Guide 2020, page 11: "The Product Owner is accountable for effective Product Backlog management, which includes ... optimizing the value of the work the Scrum Team performs."