I assume the situation is this: They have loads of dormant accounts that haven't been used in years but that have a few dollars on them. If they want to close t

I assume the situation is this: They have loads of dormant accounts that haven't been used in years but that have a few dollars on them. If they want to close these accounts, they have to find those people and give them their $7.59. By having a $10 fee, they can empty those accounts within a few years and then just close them without investigating anything. This would take significantly longer with a smaller amount.