What do you mean by unable to pay? Would it not just be more expensive? Assuming the banks will convert your transactions when you pay. The Russian banks seem to have stockpiled currency, so I assume they will be able to keep the loop going.
As in they will not legally be allowed to accept payments from Russia. There will probably be usage of VPNs and USD/BTC, but that will also probably not be legal too. And even if it were legal, a lot of people and companies will just not do it. The world plans to make things very difficult for Russia should the war continue. Also I just noticed elsewhere on HN that Namecheap has officially sanctioned Russia themselve…
Four of its journalists are being trialed right now because of January 2021 protests. They are accused for sharing a motivational video addressed to students not to stay silent.
Yesterday russian censorship started to block DOXA site, because they published anti-war debate manual. They switched their domain then got sanctioned by Namecheap.
It is very hard to host something inside country if you are targeted by censoring.