In some ways, I agree with the poster. I have driven into parks with loops closed off and driven away because of the sites left, there was none suitable for our rig.
So why not, for the absolute minimal cost, post a very clear sign saying "These sites are open, they are the same price, but there is no service, no wood fires, no bathrooms, no water, and no garbage pickup except for one central bin."
Perhaps they could leave the electricity on.
Self contained units would be able to camp, and enjoy their sites and the increased business would pay for the very minimal cost.