In 2019, the potent combination is virality/discovery+monetization. Google along with the rest of the SV CEOs and other people of equivalent status can indeed withhold that, despite the wishes of large numbers of people. Just "putting things online" is so 1990's. In 2019, the real power comes from that dynamite combination of virality/discovery+monetization. A 2019 formulation of Free Speech needs to account for that.
We saw this before in the 1980's with Manufacturing Consent. The western papers technically weren't censoring like Pravda. But in effect it amounted to the same thing.
The litmus test should be: Are there people who want to hear, yet a few are using infrastructure control to stop them? Then Free Speech is being blocked. Are there people who want to pay, yet a few using infrastructure control to stop them? Then Free Speech is being blocked.