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1 year agoNamco had a chain of arcades in the US, which was pretty wide spread, so I guess it made sense to mint their own coins. Chuck-e-Cheese, another chain of arcades (and other younger-kid oriented attractions), had their own coins too. I think most one-off mom and pop places had a generic coin or directly accepted quarters, but there were probably a few other regional chains which had their own coins.
I’d be concerned about storing both authentication factors in the same location, maybe if you kept passwords in one db and passwords in another. Not sure how well mobile apps support multiple dbs though