I'm at a Caesars Rewards casino. Insert card and the countdown shows as either 500 or 1000.

A few scattered multigame machines have fake 500 countdowns. If I play $100 through, the counter will go to 20, but I'll only receive 10 RCs & TCs.

What is going on here? Do they have an error correction mechanism? Presumably the 500 is a technician configuration error, but maybe the machine somehow knows it isn't a slot and is able to adjust the earnings.