I consider this sort of arrangement a swindle. They round up your purchases and place it in a savings account. Seems fine, but if you are like many folks who don’t have a lot of money in the checking account to begin with, a few of these transactions can bring your balance down below the point where the fees are waved. (Or, alternately, it can continually eat away at your balance and keep it below the “free checking” point.) Remember, if your balance falls below a certain figure, even by a couple of cents, you’ll get hit with a monthly fee. And given the interest most savings accounts earn, the fee will more than eat up whatever you earn in interest off the savings.
Remember also that banks use their savings holdings as loan capital; the more people have in the bank’s savings accounts, the more money they can loan out, thus the more money they can earn in loan interest. So there’s another way the bank is earning money off this.
And what is the account holder earning? A meager 1.25% annual interest on that little amount in the savings account–which, again, is more than offset by the $10 per month fee for the checking account (if the balance falls that low).
These types off accounts are really just window dressing. It’s all about serving the bank, not the customer. Remember, banks are not your friend. I’ll stick with taking my change.
(And I do understand that you can simply make sure that your balance never falls below the limit; that’s what I do in taking money out to pay for things with cash. But there are a lot of people in this world who are not very savvy about financial stuff, and who wouldn’t think it through. Just look at all the people who pay the minimum due on their credit cards. Having a monthly finance charge on the credit account, and paying monthly fees on the checking account, is just about the worst of all possible personal financial worlds.)