It is well known that secret services of unfriendly countries use material they can get as blackmail. The risk is not getting extradited to Russia, the risk is a Russian agent pressuring someone who works at (say) a defense company to do their bidding.
Big Five of other hand (UK, USA, AUSTRALIA etc) spy network are already working with your western government...
So I would rather be compromised in Russia with 0 chance of extradition there than non 0 to USA, UK GERMANY etc
(Let's say you are producing fake Coco Channel perfumes)