> He says "it can't have an advertising model" and that it shouldn't be centralised.
That does not contradict the idea that you can have gatekeepers: just make it so that the your "decentralized platform" requires payment for distribution of content and/or that it is not subject to any equivalent to "Common Carrier" rules. Sure, in theory everyone would be playing by the same rules, but in practice you'll be turning one single gatekeeper (Twitter) into many (Big Corporations, VCs, media companies, already established influencers), and everyone would presumably be paying a cut to whoever is running the distribution platform.
That does not contradict the idea that you can have gatekeepers: just make it so that the your "decentralized platform" requires payment for distribution of content and/or that it is not subject to any equivalent to "Common Carrier" rules. Sure, in theory everyone would be playing by the same rules, but in practice you'll be turning one single gatekeeper (Twitter) into many (Big Corporations, VCs, media companies, already established influencers), and everyone would presumably be paying a cut to whoever is running the distribution platform.