i remember when "it follows" was the rarest leaked movie on the net, now its all over the place. i remember finding it at an old dvd shop and was so hype....great movie
?? I don't remember that, but then again it was like 2 years ago haha. However, I do remember a korean webrip leaking not too long after it came out?? I could be wrong. Great movie indeed though, one of my favorite horrors in the past decade-ish.
You're gonna see a lot of sites shutting down in the years coming. As for straight .mkv files, your best bet is to browse public sites and find them that way. Or join a private site, but I don't know any pure sites with .mkv files only.