Commerce Bank provides that service free of charge also-I don’t know if they’re in MD yet. If not, they will be before too long.
Don’t forget that rather than take a bag of coins to the bank, you can ask for wrappers. Banks still give them out free in reasonable quantities, I think (yeah, yeah, I think). Then you should be able to at least deposit them free, right? Unless you have a crappy bank that charges for counter transactions.
Back when I was a kid, the banks had a device to count coins in the wrapper, and even tell if they were Canadian – meaning probably able to tell that they’re not slugs or other worthless stuff.
Hey, have you ever tried to bend a nickel? I don’t know about those vouchers, but I’d bet they’re a lot more flexible. 
No. How many sales would we lose as a result of customers in line becoming disgusted and leaving because of the wait?
I think I understand something now. Customers at grocery stores (I worked as a cashier once) simply believe that cashiers have unlimited time on their hands, and thus it’s okay to not start writing your check in careful calligraphy until the groceries are scanned, bagged, and put in your cart.