@elosha yeah, that sucks.
i think what would help there would be community-run annotation services with browser extensions, where people can add the original work to any website via the address.
i imagine it would work somewhat like sponsorblock. i guess it will only work on platforms where posts have some sort of ID/address but i think that's true for most content farms and the like…
image recognition a'la CLIP also seems like it would also be pretty handy detecting image plagiarism.