I honestly doubt that but even then the money would go to the site owners, not to child rapists directly. Anyhow, as I said in another post we could simply also hold accountable these who pay for it - after all the act of paying for it would cause the harm, not the data by itself.
> one to provide some child porn of their own as a barrier to entry
Create their own or just post some of what they have collected? Only the first one causes harm.
> the knowledge that their abuse is being watched by people for sexual pleasure all around the world years after it happened is a profound source of psychological trauma
I fail to see how they would know that they are being watched or how watching it being illegal eases their thoughts.
> It harms them.
No, only physical actions like rape could harm them, distributing data on the dark web does not.