Animals die on the street all the time. Then the Vashta Nerada eat them.
In all seriousness, though, while I would personally not donate money to ASPCA (like the OP I would probably first donate to help people) it’s still not funny when something like they describe happens to an animal- the situations in their ads do actually happen. An elderly couple a few blocks away moved a few years back and abandoned their cat (I’m not sure why- I think they may have been moving to a pet-free facility or something). A (frum) family on their block eventually realized and took it in, but by that time it was skeletal and probably dying. An animal that’s been raised indoors by humans is not going to be able to survive on its own very easily- in fact, it may not at all.