Yes, and boy did they pay...
One time I told a bank that they had a bug that would allow a person to do currency exchanges in which the "person" could bilk them out of thousands of dollars because of the bug. Their response, "Oh, that won't happen." It did and due to similar decisions they are no longer in business.
Another company had a product that allowed only so many admin passwords to be created (another financial product) and didn't allow old ones to be removed. I told software company, their response, "So,what?" and they are being sued by a business who bought their software because an old employee had figured out this bug and stole millions.
Ha, Ha your loss, I love it when people don't pay attention, I use it as a stick to get more clients i.e. well you know what happened to X, well let me tell you the story. You wouldn't want that to happen here, would you?