Maybe if you are discussing new sorts of businesses hareidim women are entering, but traditionally among hareidi communities going back "time immemorial" women have engaged in non-household economic businesses. Whereas among secular Jews, making money was always the "ikar" for men, among hareidim, scholarship was valued, which encouraged women to make some money (though men often worked on the side). The ideal of a man learning full time with the woman being a full time homemaker was limited to the very wealthy (albeit hareidim always lived modestly so it was a lot easier to be "rich" than among their more materialistic cousins).