I don’t understand why or in what situation you’re dismissing that argument in (1.).
Consider the specific example from the post: it’s a store that has a longstanding policy of being willing to sell people items. There’s almost no adversarial pressure from them: you know what’s available, and it’s purely your choice whether to swap or not. In other words, this is “a social context where trading is an established and central activity”. So maybe we’re just disagreeing on how common that is in general.
However, many people also strongly dislike betting without stakes.
Consider the specific example from the post: it’s a store that has a longstanding policy of being willing to sell people items. There’s almost no adversarial pressure from them: you know what’s available, and it’s purely your choice whether to swap or not. In other words, this is “a social context where trading is an established and central activity”. So maybe we’re just disagreeing on how common that is in general.
Good point, I’ll need to think about that.