Stop trying to make QR codes happen

Parkmobile Australia announced that it was trialling a new mobile payment service with Yarra City Council in the Victorian suburb of Burnley, using "the latest QR code technology". Once you register with Parkmobile, you can use the app, its website, the QR code, or just call the company to pay for your parking. Given that there are so many options, the QR code seems to be the least efficient method of paying for parking. My question is, why include it at all, let alone make it the main feature to highlight for your new parking tech?