Hackers use these lists to gain access to premium VPN accounts for free, or to resell access to others. The Risks of Using Leaked Lists
Files found on "leak" sites often serve as bait. They may contain hidden malware, such as info-stealers or keyloggers, designed to infect the person downloading the file.
Accounts in these lists are often flagged quickly by security systems and disabled, meaning the "data" is frequently useless. How to Protect Your Own Account
Visit HaveIBeenPwned to see if your email address has been involved in any known data breaches.