I just got an email with a beta key and it's saying that the key is invalid or already used.
Me too! It's a bit frustrating!
I emailed support and they sent me a new working key.
Hey guys - if any of you are getting an invalid key error, please send in a ticket to Support, and make sure to include your beta key. Support link here: ghostrecononline.us.ubi.com/support.
Yeah, thanks guys. That worked. They replied pretty quickly.