Small private trackers usually share some sphere of interests, like music, hd tv, sports, books, manga, etc, so the volume of content is comparatively small and other people on the platform are semi-interested in seeding uploads they don’t use themselves and inspecting if they are alright. We don’t have numbers for a general-use tracker just yet. And also - most instances would be very cautious of federating contents promoting direct links to any sort of piracy.
Russian edu is kinda conflicted due to the push of leaving Microsoft (they stopped licensing openly by now) to alternatives, that’s not going well with anyone but IT students I guess. But if these institutions would switch, they’d pick some closed down and paid wreck like Astra Linux. Going from bad to worse.