IME, you can maximize the value of the discount is if the rental days matches the numbers of coupon (3 for 1-2 free, 7 for Club free days). Alternative solution would be to tag these days after a weekly rental so you don't pay the daily rate beyond the weekly rate (Example - 9-day rental + 2 coupons = weekly rate). Most contracts will default to a weekly rate after 4 days since the daily rate exceeds the weekly rate - adding the free days will deduct a daily rate, but sometimes the weekly rate discount is still greater than what is being deducted.