Visa and Mastercard will no longer process payments in Russia. So that affects anything online and the use of debit cards and credit cards in shops or to pay for services.
War is so damned new in the digital age. Now the withdrawal of plastic is also a weapon.
How can Russia function when its ability to perform transactions is destroyed at the click of a button?
It's actually a marvel to behold what war looks like now. And that's before the US decides to turn off Russia's electricity grid or its internet, which I guess it can also do. This is a new age.