That is absolutely not true. You sold your game with the key. Nothing about CD keys nor secure rom stopped this. The CD key gave the game the location of the specially stamped spot on the CD to verify it was the original CD. SecureRom kept people from selling copies. It did not stop selling the original.
You haven’t been able to resell your used PC games since the invention of the CD key and SecuROM.
That is absolutely not true. You sold your game with the key. Nothing about CD keys nor secure rom stopped this. The CD key gave the game the location of the specially stamped spot on the CD to verify it was the original CD. SecureRom kept people from selling copies. It did not stop selling the original.
SecuROM limited you to 2-5 activations per CD key.
You could revoke authorizations. Which didn’t matter because until 2007 it didn’t need Internet activation.