I guess they need to switch over to demand pricing

I miss the good old days of Opening day, if someone is willing to drive up to Millinocket in January, they probably are going to use the reservations they make.
I always recommend for first timers to book a couple of days in the park if their goal is to climb Katahdin. Folks who are only focused on checking a box on a list are going to leave early once they get that box checked. The park does ask people leaving the park for good to deposit their camping pass. In theory if the park had the resources, the park could process those passes to determine last minute free spaces in the park but what value is an open slot that night to someone living several hours away from the park?. I think in the past the staff did what they could to fill last minute open spaces at KSC and Abol with thru hikers. From a management perspective, the slot is paid for and it reduces the occupancy of the park so its not a high priority.
Unless the rules have changed, a no show on the first night cancels the rest of the reservation, assuming that policy is still in place, then it is just folks leaving early. The problem is in order to book those last minute reservations that open up requires getting one of the clerks on the phone and with the decision to force all backcountry reservations to phone only for Covid, getting a reservation clerk on the phone is major challenge. It probably does not help that the Park has not had a director since the beginning of the year. My bet is the Chief Ranger just does not have the bandwidth to deal with longer term issues like reservations utilization.
Folks leave early for lots of reasons, I think it would be hard to penalize folks who do so. How would you propose it be done?