In Norway, the trolley coined gained popularity as society went mostly cashless, yet the trolleys demanded their token. An earlier factor was that it was annoying to make sure you always had a coin of the correct denomination (physical size). Trolley coins can be part of your keychain, or won't be accidentally used to buy a newspaper before going to the grocery store.
Most people still return the trolley and slide it in, like civilized humans should

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And older versions of Word ....