What about creating a virtual "credit" account where we can load rubles by:
1. Buying virtual items on AliExpress
2. Pattern
... etc .

I.e. by buying a virtual item "book chest" for let say $50 on AliExpress and providing my author.today email and/or "Номер учетной записи" I get credit in rubles by, lets say, sberbank course at the moment/day of purchase. Then I can apply this credit when buying books there.

Pros:
1. You can use different platforms simultaneously and/or switch between platforms quickly working around "sanctions".
2. Instead of rubles you can use virtual coins thus protecting authors from fluctuations in currency rates.

Allow payments with cryptocurrency by your choice