I get these spam emails all the time. Some "hacker" has my Pornhub history. They even have video (they "hacked" my laptop camera) of me, uh, enjoying myself. They're gonna leak all of it if I don't send them Bitcoin. I think it's hilarious because I'll provide that data to anyone who asks - no need for "hacking". But I'm 100% confident no one wants that data. LOL
Similar to Ashley Madison data breach, vulnerable to extortion and various shenanigans.