The ASPCA does the same thing here. If I take an animal to the "pound", I have to pay some fee to drop it off. I just posted this in another thread, but the herb Rue is a natural cat repellent. Cats hate the smell of this plant. This herb flowers, so you get some color added to your property as well as a cat deterrent.
What county are you in? I am in Larimer county. I took one in last year and was not asked to pay anything.
If I call them to come pick it up they will just take it home with a warning but if I take it to them they have to tend to the vetting including neutering before they can get it. At least that is what I was told.
I do have room for Rue and will be looking for it this spring.