From what I understand the top-up option is the most costly for Monzo so they would prefer the use of BACS where possible.
This link might help you understand more:
https://community.monzo.com/t/reducing-the-cost-of-debit-card-top-ups/28702
From what I understand the top-up option is the most costly for Monzo so they would prefer the use of BACS where possible.
This link might help you understand more:
https://community.monzo.com/t/reducing-the-cost-of-debit-card-top-ups/28702