ELI5 Market Socialism

I just looked over the wiki and which part is confusing? The first paragraph seems pretty legit.

Best example I can think of from personal experience is when I volunteered at a self-sustaining farm. We sold stuff, but all the profits were put back into the farm, and the main product was food. We only ate stuff from the farm (hence self-sustaining) and shared everything we grew.

The only part that confused me was when Wiki said that " net revenue not reinvested into expanding the firm." I'm not really sure what it means by that - where does the net revenue go then.

I guess on the macro scale that could mean that instead of us providing seeds for next year's crop (like we did one year when we had a surplus and bought buncha fancy Japanese seeds), someone provides it externally and we just produce it. But as Wiki says there are a variety of types.

That's the main issue all my students always have with these isms. They don't really exist in a vacuum. There's theory and then there's practice (hence why Marx/Engels sound good on paper but then the USSR turned into an oligarchy anyway, where money was replaced with things like status, power, and political favors).

note: I'm not an economist; just needed to study it for other purposes.

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