So, unlike many people I was actually able to get the codes for the youtube/disney offers.
It's then you come across the really frustrating thing:
Neither of those offers (and potentially some of the others, I haven't checked) seem to be available to people with existing accounts (and the youtube one is also unavailable if you've ever paid for google play music, ans I did many years ago.) If you want them you have to completely set up a new account and ditch your old one.
