Id say that mass-censorship isnt the goal. You only have to keep a small mumber of influential americans distracted. That group (the perhaps 25% who have both a vote and money/time to donate), they dictate national policy. Everyone else can scream all they want to no end. The internet allows for such focused censorship.
Even fewer if you have a gerrymandered election system. Steve Bannon, now senior advisor to Trump, is on the board of Cambridge Analytica, a company that built (and presumably enabled the exploitation of) psychological profiles to maximize shares/distribution of content on social media, targeting specific geographic clusters:
