Most files found via this method aren't the result of a sophisticated hack on Google itself. Instead, they come from:
Many directories labeled as "password leaks" are actually "honey pots" or traps. The files you download may contain scripts designed to infect your computer.
: This targets a specific filename. It assumes that a user or a script has saved a list of Gmail credentials into a plain text file and uploaded it (or left it) on a web server.