"I swear by my life and my love of it that I will never live for the sake of another man, nor ask another man to live for mine." Ayn Rand, Atlas Shrugged
The average US citizen disregards this statement as irrelevant. Further questioning might reveal that life in the US is increasingly burdened by an obligation to the state.
The cornerstone of true freedom is an unencumbered mind. Man separates himself from animals when he uses his ability to organize efforts in conjunction with properly perceived metaphysical realities to pursue a uniquely individual vision of success.
When metaphysical realities are hidden from man he is unable to effectively organize his efforts. His hard earned experiences are of little benefit as the conditions surrounding his life are subject to change at the whim of a controlling entity.
The internet has provided more than a decade of open access to information. Just as the printing press threatened controlling entities of the past, the internet challenges today's power interests. Don't expect gossip websites and entertainment outlets to be censored though as these are useful distractions. Think of them like an entertaining street performer who distracts you as his accomplice steals valuables from your parked vehicle. The censorship only applies to concepts and metaphysical truths that would alert a thinking man to conditions requiring action.
Brin has an interesting perspective on life as his family escaped the same mental tyranny that Rand passionately warns readers of. How will these interests that Brin mentions go about protecting their power? In typical fashion, they will use the taxes of the people they plan to censor.