The ASPCA stands for the American Society for the Prevention of Cruelty to Animals. They claim to support animal shelters, leading their donors to believe they will use their money to help animals, but they only give 0.045% to animal shelters.
The HSUS stands for the Humane Society of the United States. Their name implies commitment to helping provide shelter for animals, but they don't own a single animal shelter.
These organizations use pictures and stories of shelter animals to earn millions of dollars from compassionate donors. They then spend a minimal amount of the money on the animals they claim to help, and they often support euthanizing animals instead of supporting ways to save animals.