> I'm not sure about the "mission system" part.

Here's my (subjective and likely limited) perspective: the LDS church has a culture that heavily emphasizes missionary efforts. Young adult men active in the church are expected to serve missions. Most of my female friends/family who are active members are taught to marry active men who have returned home from missions. My opinion is that that missionary culture saturates even those women who have not served who are active members (especially if they have married a former missionary) and I would imagine that bolsters their willpower to persistently push these products. Additionally, there is a busy-body culture (that I also feel is heavily influenced by missionary culture) I have noticed to be always engaged in good things and I would imagine for a lot of women making money fits that mold.

I may be totally wrong, but that's a theory that makes sense to me and lines up with my experiences.