Because these files are modified by unknown third parties, they carry significant security risks: Malware and Viruses
: Many "repacks" are actually executable files (.exe) that claim to generate keys but instead install adware or spyware on your device. Approximately 20% of such "free" file-sharing tools are found to carry real malware. Survey Scams
If the main site's payment methods are unavailable, use Authorized Resellers to ensure the key is legitimate and safe. Why Private Keys Should Not be Shared - DigiCert