a) there are no sanctions against stuff like this
b) there are sanctions against stuff like this
There are also some practical problems with getting payments out of Russia.
This reminds me of an old Russian saying: "It's like trying to shear a pig: too much squealing, not enough wool."
The current recommendation from the American Bar Association is to destroy any goods remaining in Russia instead of trying to liquidate them for cash. If you're an American business leaving an office behind, smash the computers and the phones before you leave because you'll need a license to transfer them. If you leave them behind, that's considered a transfer too. It's a very easy way to make sure your company is bankrupt and you're blacklisted from ever importing or exporting anything ever again. Likely you will get extra super special secondary screening at the airport just for fun.
[1] https://www.bis.doc.gov/index.php/policy-guidance/country-gu...