Malicious actors seek to damage reputations, post embarrassing content, or lock owners out of their digital lives. This is criminal behavior with real consequences.
Keyloggers and info-stealers collect credentials from infected devices. These are sold quickly on darknet markets, not posted publicly.
Many of these sites redirect you through a series of pages that mimic legitimate login screens. They may ask you to "verify your identity" by entering your own Facebook credentials, email address, or phone number. In doing so, you willingly hand over your private data to hackers. Identity Theft and Fraud