I went to sign myself up to Lightbox using the voucher system. As my wife already used the voucher it wont let me sign up also. I chatted with a customer rep who informed me its limited to 1 per account despite having two eligible mobile plans. Having a look at their site and its only if you scroll down to the bottom of the page and spot through the 10 shouting carousel menus 'THINGS YOU SHOULD KNOW - LIGHTBOX' that there is only one voucher per Spark account.
I am annoyed because it was the Spark store guys idea to sign my wife up into my account to "save time" and make billing "easier".
I am also annoyed that their website hides this fundamental fact. Lets face it Spark is far from the cheapest, but there addon offerings give value, and when you cannot access that value its pretty damn annoying.
They are removing $12.99/month in value they advertise as a feature of their plans and I believe that is misleading. Have a look at their web page and tell me if I am just easily outraged :D