Certain games released before 2008 will not be able to be registered by using the redeem function in Origin.
This includes Spore.
In order to register these titles you will need to contact us. One of our Game Advisors will redeem the game code for you.
https://help.ea.com/en/contact-us/
Source:
https://help.ea.com/article/redeem-your-serial-code-in-origin
