[zopa]

> It did not serve as a medium of exchange in the same way coins or modern digital money do.

Source for the confidence here? We know that a corvée economy existed, but I’m skeptical that we can rule out private quipo-based exchange. The evidence base is pretty thin; a lot of stuff didn’t survive Pizarro.

[weatherlight]

https://www.peruforless.com/blog/quipu/ https://en.wikipedia.org/wiki/Quipu?useskin=vector they were more like ledgers or logs... not money. (Early databases perhaps?)