I don’t really know what Ben’s motivation is, other than that he is a complete psychopath. There’s something with his mother there because he talks a lot about her, has her photo in his meat cave, and admits to killing and eating her. Then there’s the fact that he stalks, chases (even giving his victims time to run), k*lls, and then cures the bodies with a brine mixture. Yeah. So, he’s not a good person.
At the end of the movie, you are told there are at least 20 victims.
We really only know how he lured Sasha, but it seems like he lures/stalks his victims and then surprises them with the game of cat and mouse.
