This is the "skeleton key." With a Discord token, someone can bypass two-factor authentication and log into an account without ever needing the password.
Boosting member counts on new servers to make them look legitimate and popular. The "Aged" Premium 1500 Discord Account.txt
If you ever stumble upon a file with this name in the wild, be careful. Often, these files are "backdoored." A hacker might leak a list of 1,500 "stolen" accounts for free, but hide a piece of malware inside the download. The person trying to steal the accounts ends up getting their own data stolen—a classic case of "no honor among thieves." This is the "skeleton key
Usually, a .txt file with a name like this contains a massive dump of credentials: . Often, these files are "backdoored
These aren't usually "hacked" one by one. They are harvested via "loggers" (fake nitro links or game plugins) or bought from data breaches of other websites where users reused their passwords. Why 1,500? (The Economy of Scale)