Earlier quoted context omitted.
Don't those fees get refunded to Stripe in case of a refund, though? If so, I'd imagine it's more fair to refund them completely, and instead increase the base fee for payments.
Why? Some businesses and types of businesses have higher returns.
The interchange fees aren't going up because of higher rates of returns. They're going up to pay for credit card rewards.
Stripe is keeping these fees when a purchase is returned simply to increase their overall profit.
Why punish businesses that have higher rates of returns if that is not the cause of the higher fees?