You are easily frustrated by pop-ups, or you need 100% perfectly synced subtitles every time.
The "MM" in the domain name is widely believed to stand for "Movie Manuscripts" or, in some circles, "Multilingual Movies." The platform became popular among users who downloaded high-definition movie files (often via torrents or direct downloads) and needed synchronized subtitle files (typically in .srt format) to accompany them. Www.mmsubtitles.com