Maybe it doesn't work. I've always wondered why, among so many long-ruling authoritarian regimes, China is almost the only one with such strict censorship. Yes there was the Arab Spring but look at Saudi Arabia, Russia, Belarus, Vietnam..., they don't ban Facebook yet the incumbents' rule do not face exceptionally greater challenge than China. Maybe all censorship does is to give the Communist Party is false sense of…
Reason why Russia regime still exist without heavy censorship is billions and billions of dollars burn to sustain level of consumption. Russian economy is nothing compared to China, but hey most of people there still able to earn more than average chinese and even more money dumped into Moscow (only city budget is $24B). So in past they just bought votes directly or indirectly instead of enforcing censorship.
But since oil prices are low and they run out of money there is more and more censorship appear. For instance more censorship-related laws adopted since 2014 than in 14 years prior that year.