Russian intermediary law requires registration with Roskomnadzor for services with significant Russian-language reach, mandates data localization, and historically responds to content takedown demands with broad scope. A Nostr relay inside Russia would be either non-compliant and risk blocking or compliant and unable to credibly serve as a censorship-resistant venue.
The operational pattern is offshore hosting (Finland is closest in network terms) with Tor onion fallback for users behind DPI throttling.