Now the distinctions between these four types of things are a bit blurry. You could embed recommender systems or markets inside of legitimation process vice versa and there are ways of kind of splitting the difference but in general with recommender nobody really understands how it makes choices with a network of private groups there's no common schema to have the groups operate so no one there would know how to please the social algorithm either with incentive structures you can think of markets and as legitimation processes both as a way of making what happens in the private groups accountable and transparent and universal but they take opposite strategies and the market strategy is to make all the relationships anonymous and to have multiple suppliers for each point for each problem the market solves. compete with each other. market can be one layer deep where producers have profiles and consumers can bid on their products or it can involve multiple layers. If you insert curators quality auditors insurance cetera