Copyright. If you say “You can find X at Y” US copyright has gotten so out of control even linking is infringement like hosting, even via magnet link. The megathread is pretty old and doesn’t even have old things that are still useful like the saved google searches, so your point is apt… Have you tried watchsomuch or OG piratebay? Piratebay has more old shit still with seeds than you might think.

Hope whoever leaked it has FIRE opsec

There are also lists one can find of open proxy servers, they’re all probably malicious but if just getting a single file via https… it would be non-incidental to override the certificate check, so these gutter proxy sharks are probably not at that level unless a major state actor wants you.