Scenarios are examples of Barter.
In trade, barter (derived from baretor) is an exchange system in which parties engage in a direct trade of one commodity or service for another without the use of a medium of exchange like money. Barter, for instance, involves immediate reciprocal transaction rather than one that is delayed in time, which is one way economists differentiate it from gift economies.
Although it may be multilateral, barter often occurs on a bilateral basis (if it is mediated through a trade exchange). Barter typically only coexists very minimally with monetary systems in the majority of developed nations. When there is a currency crisis, such as when the currency is unstable or simply not accessible for trade, market actors substitute barter as the medium of exchange.
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