Hah, that is really interesting. I suspect this is to stop people from paying with a large quantity of coins to be an ass. Any idea how that plays out when trying to change bags of coins at a bank?

coin-op vendor: I would like to deposit all of my bags of coins.

bank: Sorry sir, your money is no good here unless you break it into smaller quantities.

I knew a contract security guard that worked for a laundromat. They paid him in bags of quarters.