Scarcity can be a concrete feature of a product: reduced production quantities, available materials or slow processing can limit its supply. For the customer, understanding the reason and meaning of the limit helps to evaluate the proposal.
A communication of exclusivity should describe what is actually limited. Quantity, period of sale and characteristics of the edition are different aspects. Using the same formula for everyone can generate unclear expectations, especially if the product becomes available without explanation.
I propose to observe how the promise is kept over time. A customer who purchases for a stated feature should find it in documentation and service. Perceived value remains an individual assessment: a quantity limit does not demonstrate superior quality or economic convenience.
A hypothetical example is a custom production that takes months. The communication should link wait, update mode and actual conditions. Scarcity thus becomes information about the proposal, along with design, materials and use. Trust depends on the consistency between story and real availability, without assuming that each customer seeks the same degree of exclusivity.