Almost everyone is familiar with tokens. There was a time when tokens—small metal disks the size of an American quarter or a euro coin, were issued for admittance to theaters. Pay your money, get a token, and drop it in the turnstile allowing the theater to keep count of attendees. For fans of video arcades, visitors bought tokens used to play games. Winners were issued a slew of tickets, which could then be redeemed for a prize. To get through a subway, you needed a token.
Grocery carts in Germany require a fiat coin or a token to release the buggy from its chain lock as a means of keeping up with the carts. When the customer is done and replaces the chain lock, they get their coin or token back.
These tokens have no value outside ...
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