GitHub account name squatting is prohibited. Inactive accounts may be renamed or removed by GitHub staff at their discretion. You can examine if there's activity on an account name and request that support release a name for your use, but keep in mind that not all activity on GitHub is publicly visible. Staff will not remove or rename any active account.
GitHub account names are provided on a first-come, first-served basis, and are intended for immediate and active use. Account names may not be inactively held for future use.
Attempts to sell, buy, or solicit other forms of payment in exchange for account names is prohibited and may result in permanent account suspension.