These. torrent sites uses visitors cpu power to mine cryptocurrencies like bitcoins this method is called Hijacking.
There is a lot of awareness about the content downloaded from these sites like malware and trojan. Hackers are indirectly entitled to these sites for downloading malware into files.
This script uses CPU power in your computer / laptop and uses CPU power to turn the site's bitcoins off. That's how you make money through your system without getting upset.
Now in the same manner, other torrent websites are equipped to use our computer power using bit coin mining. When you use these sites, you can find the CPU usage increased when you open the task manager.
There will be a solution for every problem, to solve these type of hijacking issues, we have another post.