Why do married women / engaged women put their Snapchat in their IG bio?

I respectfully disagree, I believe this is to stroke her ego and go behind her fiancé to get compliments from other men, then playing the “sweet little angel” card and grandstanding, who else is going to add her Snapchat, really? She knows that guys will add her and she knows they will keep adding her, but she keeps it anyways. Moral grandstanding