Bit of a late proposal.
I used to work for bankwest. One of the well received feature was their Zero Transaction account that offered a $100 credit on their account (your account can go to -$100 without fees or charges. The issue I see with that for Xinja is it will cost Xinja and also will mean customers are required to do a credit check. Onboarding process becomes clunky…
I’m not sure weather it is possible to allow for direct debits only, you to go into negative balance say up to a certain amount say 150? Or 250? On the condition that your TOTAL account (incl stash) balance with the bank is above zero. You then offset the negative balance against the stash savings and not pay interest on that balance. This protects customers from those horrible failed payment fees by the suppliers!!!
Doing this, it does not cost Xinja money and the customer does not earn taxable income on one side and have a non-deductible expense on the other for tax time. Almost like an offset feature on a mortgage!
Since customers must move money through the transaction account there is technically no risk to Xinja as they cant withdraw below $0. It also promotes the habit of managing cashflow/savings
Just a thought.