Re: I'm puzzled by these attempts.
@Steve Davies 3,
"The difference between this and the other types of payment service is that the merchant does not see your card details. Thus they can't track your shopping habits!
For the likes of Tesco this is not good. I will very surprised if they sign up for apple Pay at launch."
For the likes of Tesco it is irrelevant. The law in the UK prevents retailers retaining credit / debit card details, so they cannot be used for tracking customers' shopping habits anyway. Pay by Bonk doesn't change that existing situation.
This is why they all have loyalty card schemes.