Indeed, fundamentally capitalism is about individual economic freedoms to own and invest capital. A private shop owner is just as much a capitalist as a corporate CEO.

Also capitalism is in no way in opposition to other individual freedoms such as unionism, liberal democracy, etc. You can have capitalism without them, just look at China, but I would argue that as a freedom, capitalism is most naturally aligned with other such personal freedoms.

As you point out rubber baron and oligarchic systems are based on suppressing freedoms, including often individual rights over capital. Corporate scrip isn’t capital, so clearly it’s iuse is actually anti-capitalist by restricting individual rights over capital.