Best of luck to the author! My understanding is that anything that makes large file sharing easy and anonymous rapidly gets flooded with CSAM and ends up shuttering themselves for the good of all. Would love to see a non-invasive yet effective way to prevent such an incursion.
If governments and big tech want to help, they should upload one of their CSAM detection models to Hugging Face, so system administrators can just block it. Ideally I should be able to run a command `iscsam 123.jpg` and it prints a number like 0.9 to indicate 90% confidence that it is. No one else but them can do it, since there's obviously no legal way to train such a model. Even though we know that governments have already done it. If they won't give service operators the tools to keep abuse off their communications systems, then operators shouldn't be held accountable for what people do with them.
The biggest risk with opening a tool like that is that it potentially enables offenders to figure out what can get past it.