If there was a moment to use QR codes for something useful it would be that receipt. The last thing I want to do is type some 34 character case-sensitive id into my browser to get my money.
Your €1? Seriously? If you really cared about €1 you'd obfuscate the ID, and put a bogus QR, but geeze, €1? I suspect in reality that while you were busy sticking paper labels to a pub condom machine with blue-tack you forgot the obvious utility of a QR code on the ticket.
I'm still stunned that Microsoft and their Kinect wizardry can't scan those XBL codes so you don't have to waste so much time typing them in. QR codes have a use!
Most of the codes I've redeemed are for things that come bundled with something I've already purchased.
I doubt typing in an annoying code is going to make a meaningful difference in the redemption percentage of purchased point or Live cards. The biggest factor there is losing track of them.
