> They get half the interchange fees on every transaction. That's the benefit, worth MUCH more than "interest" (which is only at 0.01 percent at the moment). The other half of the fee goes to Bancorp.

They have a lot of costs for that interchange fee though. That's not where banks make they money and the .01% interest you mention is what they pay, not what they would earn if they actually held your deposits. If they held your deposits and worked like a regular bank it would be dramatically more profitable: $10,000 in your account means they would owe you $1 a year in interest. They could simply park that about anywhere else and make a decent amount, but banks really make their money by leveraging.