I'm not focusing on 'money or currency as general media of exchange' but rather expressions of…

Have you seen this? https://youtu.be/6Uz4PRWr3ns

I'm not focusing on 'money or currency as general media of exchange' but rather expressions of promises/commitment (vouchers) and holding them has a cost (demurrage). Networks of these vouchers from a complete monetary system. Without 'money or currency'.

Have you seen this? https://youtu.be/6Uz4PRWr3ns

Imagine how a group of people commit to supporting eachother and pool these commitments into a mutual aid system.