

Posting something on a private platform is actually not public. It is the private property of the platform owner and they can make it public or private any time they want or find ways to commodity it in their terms of service when you sign up.
I say this to back up what you say about the myth of the digital commons. Most online networks are not a commons at all, they are the exact opposite, they are an enclosure to extract profit from what would otherwise be a commons, usually built by finance capital to have appealing features at first, generated at a loss, and then once profit needs to be taken the alleged “commons” is increasingly closed and monetized. Journalista don’t really understand this, sure, but neither do most people. They expect, correctly, that social interactions should be analogous to chatting with someone on the street or at a public square, and social networks try to give that illusion.
Regarding individual choice, well a person is surrounded by the exact opposite of what we are saying and all their friends are on their addiction habit social networks so what would you expect them to do. These things don’t just happen on their own, people must work to organize and educate on the way capitalism turns their social lives into profit.




Very small businesses would tend to be private. At least that’s the trend. But keep in mind even a worker-owned co-op is a private business so it’s one of those things where the exact implementation has varied. And many businesses that would otherwise be private and might be partially nationalized, requiring certain standards, barriers to creating a storefront, strict rules on employment (or not). It’s something that countries can experiment with. Struggle doesn’t end after revolution and the development of productive forces changes employment.
The best targets for nationalization are the big industries, the developed ones. They are much easier to plan and run and expropriate. But a country could do so earlier if conditions allowed. Keep in mind that every country with a socialist revolution has faced constant attack, so they have been under fairly desperate conditions to industrialize or otherwise abandon more idealistic forms of work, e.g. being the primary target of Nazis.
In Marxist terms you can usually summarize it in two: material inputs (dead labor) and labor. Profit isn’t an input to production, it is actually variable and is just what is left over after all expenses. Income vs. expenditures. Raw materials and machinery are just commodities you buy to do production.
It could be business taxation or it could be a redirecting of productive capacity (provide X prefab concrete widgets to this state project). Profits don’t need to be redirected, that’s just an accounting question. They may be made unprofitable by a given expropriation. But in countries taking this approach, like China, it’s mostly business taxes.
If the co-op runs the business and is functional then the workers are basically setting their own wages and trying to optimize their business to pay as much as possible while still doing well as a business. If this is basically private enterprise then over time the state will begin direct involvement as it grows in size, observing production, expenditures, living conditions, etc. If a state allows small enterprise run more like a capitalist business, then eventually the state may step in a force cooperative governance, ensures a state-meditated union, etc.
But really this is exactly something that countries have experimented with, it’s not just one prescription. And it has varied based on conditions, particularly external ones from imperialist countries.