As Binance mentioned, this is not a Binance-Russia problem, they will allow the Russian users, but Binance and Mastercard get banned in Russia as part of the sanctions. You can read more about the ban in the next article posted in the guardian.
That means of only international transactions are banned, Russians will have no alternative than to go for p2p means of exchanging bitcoin, other cryptocurrencies and fiat.
“Until the expiration of their validity, Visa and Mastercard cardholders have access to all the funds on their accounts, as well as all the usual payment transactions – paying for purchases, transferring funds from card to card, withdrawing cash, etc.”
The expiration date can take up to 4 years, although some users card expiration date would have already close by.