Few vignettes about paying for Moscow Metro During my childhood in 1980ies the cost to ride was 5 kopecks (0.05 rouble), payable via hefty, sizeable, incredibl

Few vignettes about paying for Moscow Metro During my childhood in 1980ies the cost to ride was 5 kopecks (0.05 rouble), payable via hefty, sizeable, incredibly pleasant to hold 5 kopecks coin (https://ru.wikipedia.org/wiki/%D0%9F%D1%8F%D1%82%D1%8C_%D0%BA%D0%BE%D0%BF%D0%B5%D0%B5%D0%BA#/media/%D0%A4%D0%B0%D0%B9%D0%BB:Soviet_Union-1989-Coin-0.05.jpg https://ru.wikipedia.org/wiki/%D0%9F%D1%8F%D1%82%D1%8C_%D0%B...). With hyperinflation in the late 80ies the costs quickly went up by lots of powers of 10 to first roubles, then tens, hundreds and eventually thousands of roubles. For a while the entry fee was paid via tokens that you bought with money at kiosks, and the tokens were identical in weight and size to 5 kopecks, so same old machines could be used. Some people who had old soviet coin stashes could and did ride for free. Machines that didn't like the coins would slam you sideways hard. I still am instinctively afraid of those that look like one that smashed me when I was about 5. Fast forward to late 90ies and early 2000s, there were single use magnetic stripe and rfid tag tickets that were discarded by people all over the ground, really messy and likely unenvironmental. Haven't been there in a while but seems like an Oyster (London)/Opal (Sydney)/Ventra (Chicago) payment cards would likely be what I'd want to use, just as much tracking but without the creepy factor of face recognition