Charge $5 per each piece of advertising. Unless it's political ... then charge $10 each piece.
I honestly think they do a pretty good job. My main complaint is that not all offices have an after-hours kiosk ... and those that do, the kiosk isn't maintained as well as it should be.
I would give then new hats that say - FU Trump. Trump is saying that he won't sign the coronavirus aid package if it includes any money for the post office even though they are loosing lots of money because of the virus. Cheers!