Though this thread is from a year ago, thought I'd answer the reason WHY any purchase (free, or otherwise; or gift card balance available) will request approval by the organizer of the family. Simply, because the "require approval to purchase" is on (Though, this we all realize, I know ); this a parental control feature, to give control over children's accounts to the parent, so the child can not simply add any app/ song/ book because it is free or they have a balance available.
i love this feature! I have a (almost) 13yr old, a 8yr, 7yr, & 6yr olds, in my home, regardless if i (or a friend or another family member) gives 1 (or each) a gift card to iTunes, they are not allowed to simply purchase whatever they like. For one reason, it is very likely they would waste money on an app they thought looked cool, w/o reviewing it or verifying if additional in app purchases are required- though this is more w/ my younger kids, my oldest has wanted an app that had poor reviews, has not been updated in yrs, or apps that didn't do what she thought it did. But the main reason is due to the games, apps, music, books that they could purchase, that I wouldn't permit them to play, listen too, or read. Which is the main reason I love this feature.
I'm very particular about what I allow into their minds- violent games, heavy magic/ sorcery games, superficial glam/ materialism/ & the like, as well as much of the popular music put out these days (seems like everything deals w/ rejecting authority, drinking & drugs, how hot or sexy another is, breaking up w/ someone because they were boring, giving your number to a 'hot' boy you just met calling him 'baby', adults are stupid & just don't get (how superior kids intelligence are, the issues they deal w/, blah) 'them'. I also control any & all online group games & social sites, and have learned it is far easier to make sure they are safe when they can only play on the computer or TV game system (Xbox, PS3, wii, etc), which are in the LR. My oldest used to have Graal on her iPad, which is an multi-online player game. It is not moderated for language, discussion topics, etc, which often was highly inappropriate for any civil discussion, let alone a child to read.