It's darker and more sinister than just that. Think of Government + social media + corporations + political groups and activists. The government privately leans on corporations either through the IRS or DOJ, or EPA or similar threats. CEO's are not invulnerable to attacks and removals for refusing to play along. Government leans on social media to control the narrative and direct activists to the scripted campaign to crush opposition on almost anything.
Hence my mention of that private party hosted by President Obama on February 17, 2011 in San Francisco that had in attendance the CEO's of Apple, Cisco Systems, Facebook, Google, Netflix, Oracle, Twitter and Yahoo!. (That dinner party also had Obama's most trusted adviser, Valerie Jarrett, in attendance.) Is it possible that during the off-the-record dinner conversation that the President got the CEO's of these companies heavily involved in "tweaking" the data algorithms for search and discovery to favor Left-leaning topics on the Internet? If so, then these companies are complicit in government censorship for suppressing political opponents, something that violates First Amendment free speech rights.