It was LevelUp who tried to pioneer QR code payments, over in the US at least. We still have barcode scanning peripherals in work to regression test payments with it, though I'm not even sure anyone in production actually uses it, we maintain it as an option.
In the UK, QR codes seemed to be primarily used in adverts to direct to online adverts. A bit like Shazam is doing for sound. So they have a bit of negative association with them, almost an augmented banner ad.