: Validated accounts (called "hits") are then resold on marketplaces for a profit. How to Protect Yourself

: Generate unique, complex passwords for every single service so that one leak doesn't compromise your entire digital life.

A "mixed" combo list specifically implies that the credentials inside are not targeted at one specific site. Instead, they are a General Aggregation of logins from different sources across the web.

: Files with names like "Mixed-Combo.txt" are frequently bundled with Malware Samples or "Zips" found in sandboxed analysis environments. They serve as the "input" data for account-cracking software. The Risks of Credential Stuffing

: Bots can test thousands of credentials per minute across hundreds of websites.