No sure about that. While he was alive he could do things/get stuff done to him which would get reported in the news. Getting poisoned by Novichok, getting arrested in a Russian airport, disappearing and reappearing in an Arctic gulag – all of these things show up in the news cycle, giving us constant reminders of the how bad it is in Russia. Now that he’s a martyr, I guess his name will disappear from headlines until maybe the anniversary of his death.