I'm pretty sure that if <insert ecommerce platform here> were to leak all their financial transactions, that is considered a large data-breach and would be cons

I'm pretty sure that if <insert ecommerce platform here> were to leak all their financial transactions, that is considered a large data-breach and would be considered a privacy infringement. I am aware that "an ecommerce platform" is something else than "your personal finance", but the principle is the same: X shouldn't release other people's financial transactions just because those were done with X.