I tried it and got the results you did! It worked, as long as the realm 'existed'. What I need to find out from QB, is what it means for the realm to 'exist' - ie do they just need to create it, but can deactivate it from me being able to build on it? This way my QR codes work, but its not like they have provided me with two realms to build out.
Ill see what options they can provide.