I meant that it acts as if it were a credit card from the payment processing point of view.

I address the same problem by having multiple bank accounts that have small balances and auto-depositing my monthly budget for different things into them. If any one gets compromised (and the bank is unwilling to fix it), it doesn't take out my whole bank account. Plus it provides a nice "money into envelopes" style of budgeting that's very easy to understand.

If your card only works at the ATM, then how do you buy expensive things (something that costs more than the daily ATM withdrawal limit)?