I could get a free vaccine if I want to drive miles out I suspect, there just are not many appointments to be had. The websites are at times not functional ect...I'm really surprised to hear this. I am curious where So_Money lives. I just looked it up and in my county alone, there are 6 different free testing sites.
The biggest issue is you often need to fall within a specific window to have proof, it is not like just finding an open appointment is good enough, it needs to be on a specific day or two. It is a PITA.