Already on the majority of cards out there? I wish!
Pay by bonk is on Barclays credit and debit and thats about it.
The other banks and issuers are still faffing around trying to decide if it is worth it, or doing the odd pilot here and there.
For this to catch on there needs to be a critical mass of users which means getting a decent percentage of cards (credit and debit) bonkable
Once people are used to bonking at the till with their cards, then maybe things like the sticky will catch on