HI Ben,
I’d love to have your thoughts on this thread about this very topic.
Other than keeping the API running, I don’t think there’s a huge amount to that Monzo would need to do to make this a reality. Perhaps a nice app-to-app OAUTH2 implementation.
Not really aiming for the big players like Tesco or Cineworld, more the awesome little independent places where the spend to reward ratio is ridiculously generous.
Mike.