Microsoft employees with Ukrainian roots, you're the best - I know that you made a lot to make this possible. We'll win together / переможемо разом! Слава Україні!
Correct, it won't affect subscription services such as Xbox Live, Game Pass, Office, etc, because that isn't a new sale, it's a continuation of an existing sale.
( Twitter)
I think the main difficulty is how to renew if your card wouldn't work.