By staying away for the sake of $20 you are guaranteeing that that apron won't be extended, or that that pothole will not get filled in.
Good luck extending an apron or fixing a pothole with 20 bucks.
You'll bring more money into the local economy therefore a greater economic benefit by dropping fees and having people want to stay the night, grabbing a pot and parmy, grabbing a cab each way to the airport etc.
Part of my flight planning is landing fees where I want to overnight - refuel.
This 'user pays' bull**** is a pox on the community. It's a pleasure flying in countries that see aviation as critical infrastructure that benefits all.