rivalry.
in economics, a phenomenon in which the consumption of some goods prevents their simultaneous consumption by other consumers, occurring for most tangible goods and some nontangible goods (e.g. Internet domains), but not for others (e.g. TV broadcast)
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About rivalry
In economics, a good is said to be rivalrous or a rival if its consumption by one consumer prevents simultaneous consumption by other consumers, or if consumption by one party reduces the ability of another party to consume it. A good is considered non-rivalrous or non-rival if, for any level of production, the cost of providing it to a marginal (additional) individual is zero. A good is anti-rivalrous and inclusive if each person benefits more when other people consume it.
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