Western sanctions have disrupted nearly every part of Russia’s financial system, but there is one big exception.
The domestic-payments system continued to work smoothly after Visa Inc. and Mastercard Inc. pulled out earlier this month. While the card giants’ exit from Russia was viewed as a significant move by many in the West, the reality on the ground was anything but. Most Russian consumers never lost the ability to use their Mastercard- and Visa-branded cards to pay for things within the country.
Source: https://www.wsj.com/articles/russia-built-parallel-payments-system-that-escaped-western-sanctions-11648510735?mod=itp_wsj&yptr=yahoo