The SPCA says re their seizure from Forgotten Felines, "Cruelty investigations and ongoing veterinary and rehabilitation costs for seized and surrendered animals are generously provided through public donations."

I expect that cruelty investigations are expensive affairs. But though the SPCA's press release mentions that other groups took the cats, it did not name the groups, so there was no way for the public to know which charities were paying the considerable expenses for the cats' rehabilitation and care, and donate to them if they chose to.