Some sites generate pages for every URL you try to access on their domain. site.com/movie-name.html is auto-generated when someone tries to access it and not stored anywhere. Google's bot recognizes this and doesn't bother listing the page, but the dumb DMCA bots are apparently not so smart.
That's why sites with zero actual content can attract hundreds of millions of DMCA notices. I do wonder if they are honeypots designed to waste the bot's time or testbeds for anti-DMCA-bot technologies.