[Slonopotam845]

Right that. The Russians wanted to stop paying for that and have had plans in place for several years to migrate their main launch site to Svobodny 17 in the Amur Oblast. But apparently that was shut down. Plesetsk is still active and it has the added bonus of being well located to hurl objects into polar orbits - good for spy satellites. It will probably be expanded in the future to handle heavier lifters.