It's very sad.  I used it to find my cat.  I have a friend that does rescues like you.  She has 8 cats and one Grayhound.  All of them are special needs; diabetics, injuries, etc.  She also helps find homes for the pets on Petfinder. 

Last week the ASPCA Hospital in Manhattan relinquished the $75.00 fee to adopt a cat just to try to get them homes.  They were so full, they needed to do something.  It worked, they were able to adopt some out.

I wish more people were responsible with spaying and neutering.  When you see all those little faces on Petfinder, it truly is heartbreaking.