Good question. I signed up for an @icloud.com email and they don't go there. They don't go to my Apple ID email. I haven't tried the icloud yet because I haven't figured out how to use it. I tried to set all notifications to come in like an amber alert, which would work perfectly, and that didn't do it.
If you are not holding your phone and tap the notification in a few seconds you miss it and have no idea it was requested. Family Sharing forces you to manage the account from your mobile device and then finds a way for you to not be able to find these requests. This is a huge Family Sharing FAIL.
So the family member has to call me and tell me the ask to buy is on the way?
They built a ton of useless crap into ios8 and left out the one thing I need. The one thing that would be useful to me besides it being a telephone.