The term is a honeypot. The sites that rank for this keyword are usually dangerous, filled with redirect loops, or simply fake.
The modern replacement for MKVCinemas is the private Plex server. Reddit communities (r/plexshares) often offer slots for $5-10/month where admins automate the exact "extra quality" x265 MKVs you are hunting for. It is piracy, but it is organized piracy with quality control. searching for mkvcinemas in extra quality