Why the fixed fee in the first place? You could charge a flat interest rate but require the customer to pay you back a minimum of x% of their stripe volume per

Why the fixed fee in the first place? You could charge a flat interest rate but require the customer to pay you back a minimum of x% of their stripe volume per month. Allow the customer to pay a higher percent of volume if they choose, and reward them for paying you back by lowering the effective rate. I somewhat agree with the point the GP made, the fee structure is very much an early repayment penalty in disguise.