The average minimum balance needed to avoid fees is now nearly $10,000
The fees can drive many out of the banking system entirely, experts say.
The popular travel card is getting more expensive. But the bank is betting that new perks, designed to appeal to younger consumers, will make users stay on board.
Charges are especially high for using out-of-network machines.
These days, banks have to do a whole lot more than take deposit and make loans.