Firstly, I am an Xbox gold family pack member (not the owner). I used to be able to go through the very long process of granting allowance to myself through the owner which I cannot do anymore.
When I try to purchase anything the download menu does not say anything like "confirm purchase".
As you can see I can select "Add Payment Option" and all that menu says is "Redeem Code" for prepaid cards.
So I then dashboard and go to "Account Management" when I try to "Manage Payment Options" it comes back saying "...go to xbox.com/error " although does not give me an error code.
It is worth noting that every other member of the gold family pack can purchase items. They have an extra option in the download menu "Confirm Purchase".
I just want to give you my money! I gave as much detail as I thought was needed. Ask any questions if needed and I will answer the questions with as much effort as possible. Also thank you so much!