Goes to show, you can shake-up a sector with your modern infrastructure all you want, if you still have to plug into it somewhere...
To be completely fair to Monzo though, my limited understanding is that this reliance on a 'supplier' for payments will go away when the beta ends and Monzo's a full-fledged bank/current account, rather than just a prepaid card.
EDIT: ^ That was correct, that is the intention: [0]
> When we launch the current account later this year, it will not use a third-party card processor and instead transactions will be processed entirely on our own technology.
To be completely fair to Monzo though, my limited understanding is that this reliance on a 'supplier' for payments will go away when the beta ends and Monzo's a full-fledged bank/current account, rather than just a prepaid card.
EDIT: ^ That was correct, that is the intention: [0]
> When we launch the current account later this year, it will not use a third-party card processor and instead transactions will be processed entirely on our own technology.
[0] - https://monzo.com/blog/2017/03/05/outage/