Returned a car around 2 hours ago.
Original plan was for 5 days, weekly rate of a little below 100 USD.
Returning two days earlier. They automatically charged 3 days 16 USD each plus taxes etc.
I remember a while back when i did the same thing they reduced the rental price in a similar way, but charged some kind of early return penalty of 25 USD or so - not this time.
Both time i reserved the car on their website.