+1 for using marketplace dynamics, particularly when you want groups to be able to grow to be quite large. (For small groups they are overkill and potentially harmful.)
This can be done without involving anything crypto related too. A great design principle to incorporate is Stigmergy: https://en.wikipedia.org/wiki/Stigmergy
To be clear though: Just because folks talk about using "markets" doesn't mean those marketplaces have to be built around "currencies" as we typically imagine them (crypto currencies included). They can be built around anything that can be counted or conceptualized numerically. For instance, HN / reddit votes are a type of stigmergic marketplace.
When designed effectively, markets can be massively scalable engines for human consensus.
This can be done without involving anything crypto related too. A great design principle to incorporate is Stigmergy: https://en.wikipedia.org/wiki/Stigmergy
To be clear though: Just because folks talk about using "markets" doesn't mean those marketplaces have to be built around "currencies" as we typically imagine them (crypto currencies included). They can be built around anything that can be counted or conceptualized numerically. For instance, HN / reddit votes are a type of stigmergic marketplace.
When designed effectively, markets can be massively scalable engines for human consensus.