This piece, about online censorship by the government Venezuela loves to seek technical assistance from, is absolutely chilling in its detail:
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…[Chinese] censors expend even more effort on the task of “guiding” expression in pro-government directions. When a story reflects well on the Party, Web editors receive instructions to “place prominently on the home page” or “immediately recirculate.” Authorities also organize and pay for artificial pro-government expression in chat rooms and comment boxes. Provincial and local offices of External Propaganda and Party Propaganda hire staff at salaries of about US $100 per month (less, for part-time work) to post pro-government comments. It is hard to say how many salaried commenters exist nationwide, but estimates run to the high 100,000s. Some of this commenting is outsourced as piece-work. A few years ago, people who agreed to do this work were given the satiric label “fifty-centers” because they were said to be paid fifty Chinese cents per post. By now there are commercial enterprises that contract for comment work. Even prisons do it; prisoners can earn sentence reductions for producing set numbers of pro-government comments.