Most families who brought out cabbages did so willingly; they might eat less themselves, but they made some money too. Yet, there were those reluctant to comply, "Just because we were taught the pickled cabbage recipe doesn't mean we can all sell pickled cabbage to make money, yet you used it to buy our winter's supply of cabbages and radishes!"
"This isn't simply teaching, this is bartering! Still, it's presented so attractively, fishing for compliments! It's practically coercive trading!"