Earlier quoted context omitted.
Whether or not they are governments is a question of definition. Definitions are important, and social networks don't fit very well into it. They are fundamentally different from modern governments as they do not have a monopoly on coercion. If social media are governments, then every corporation - no, every association of people - on Earth is a government.
The key here is governance . ------------ I think if you click into the linked post, you get the analogy regarding governments and governance . Web platforms have to concern themselves with governance of their users and the respective eco-system that their users operate on. The point is less to be abstract or symbolic, and instead look at the concrete decisions they have to make. Corporations or general relationships…
Governance is the final frontier. By that I mean "How are grievances adjudicated?"
Any one struggling with the "platforms as government" analogy might think of MMORPGs instead.