They don't care about porn
I really don't think this is about porn, so much as politics and maintaining a police state.
Banning porn is silly, its harder to get really outraged about policital censorship when they are banning porn, and .. video games which are an insult to their national identity or whatever.
So 9 out of 10 sites they ban are porn ... the rest are political. Plus they can arrest people for porn charges when really they were accessing political content.
I just find it really suspicious whenever a government is trying to crack down on porn, prostitution, illegal substances that are mostly harmless ....