They weren't selling digital copies. You could only get these by buying a physical copy. They came with a code allowing you to also stream the digital version.
They're using only chunks that have already separated, transporting it on outgoing cargo ships that are already empty and it becomes one of the few export products for Greenland.
Weird idea, but there are a few redeeming points if you look at the full story.
Torrents are metadata files, they're absolutely hosted on websites.
They only describe how your BitTorrent client can initiate the p2p connection, they obviously don't have the actual data that's shared, only info about that data.
Most Blu-Ray disks have DRM encryption. There simply doesn't seem to be a (legal) decryption mechanism on PC, probably to avoid people ripping the movies.
They weren't selling digital copies. You could only get these by buying a physical copy. They came with a code allowing you to also stream the digital version.
They did lie about the "forever" though.