You gotta give the masses a sense that the party is doing something for them, usuallly something unrelated to party affairs and politics, like civil criminal cases, that's when the censorship turn "lenient", and these specific cases that got public attention usually get to be solves quickly. But you never see sensitive matters being allowed to even exist, and any account who dares to challenge this boundary is quickly terminated..

That's the magic of censorship, to make the masses feel good, coz ignarance is bliss, the news are harmonious and bad apples are handled by the dear gov.