It looks like it was manually vetted, which i could not do for the community. i could see it being gamified or otherwise attacked, and i'm loathe to say it but LLM+RAG and a way for users to flag records might suffice to start.
In fact, what might be easier is a fediverse bot or similar that is both input from users to a job posting URL, as well as posting automatically vetted "excluded in <territory>" that's backed by an rss feed of a simple LIFO index page. That way you get the best of all three worlds for the UI and i don't have to set up email.