How do you hide purchases? I haven't been able to get the wife to update to iOS 8 yet or I'd test it out
Not familiar with hidden purchases but sure, you can still buy with iTunes credit. You still have to have a credit card associated with the main account, though.
I'd like to add a question:
Can you belong to more than one Family Sharing group?
I'm thinking as a real example, a child of divorced parents, both of whom want to share purchases. Could the child belong to two groups?
Before you had to go on the iTunes app on Mac and then on your account purchases section. With iOS 8 you can simply go on the App Store Purchased section and then swipe right (left?) and a red "Hide" button appears.
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So you are using Family Sharing and have made purchases with iTunesStore credit? Not with that shared credit card?
Also, do you get that notification about purchases/approval even if you buy with iTunes Store credit?