The difference is that ransomware gangs often come through with the decryption keys, while these two examples make it seem like it is common for kidnapping gang

The difference is that ransomware gangs often come through with the decryption keys, while these two examples make it seem like it is common for kidnapping gangs to just keep the ransom and bury the hostage in a shallow grave. Ignoring the enormous moral issues, I wonder what the business incentives are here.