Comment by Mezzie

I think that the best idea, depending on what services you provide (since that matters in terms of tactics and communication), would be to take the money and donate it all to the Ukrainian war efforts (Option 2). Make an announcement to that effect, but a very, very low key one.

That way any Russians doing business with you that do support Putin will pull their money (or you take their money and give it to their enemies, preventing them from using those resources elsewhere), while Russians who do not support Putin will keep using your service. By making the announcement low-key enough/missable, you give Russians opposed to Putin a plausible out. "Oh, sorry, the sanctions/West took out my net for a while and I didn't see that they were dirty traitors, my bad." It might at least buy someone one extra chance/time to communicate.

If 80% of international companies throw out their Russian customers, then the Kremlin has to look fewer places to find where their domestic opposition is hiding things or talking. If I want to know what kind of credit card someone has, there are only a few options. If I want to know where someone bought a certain candy bar? That's a lot harder.