As to your first question, I ask my daughter that all the time. I see no value to it. She’s in a sorority at her college.
My daughter is in a large southern sorority and I see all kinds of advantages. It is amazing how many connections she has made and as she applies for jobs it is opening a lot of doors. I knew nothing about soroities before she rushed by I have become a big fan of them over the years. Of course it helps that the girls are overwhelmingly conservatives with conservative parents.