Not sure if anyone posted this yet, but re: the Xbox Live Rewards email promising a non-existent beta code, I chatted with MS support and received this:
Shawn: at 14:08:14
Hi, this morning I received an e-mail from Xbox Live rewards saying that I was given access to the Division Online Beta. In the section that said "Beta Code: Download" no code was visible and clicking the download link did not take me to a valid download.
Mikael: at 14:09:18
Oh! I am sorry to hear that, this has been an on going concern that we have. The email seems to be an auto generated email that is being sent to all xbox users. This is intended to advertised the game.
Shawn: at 14:11:53
So the section that says download the beta now is an error? Or will they be resent with beta codes?
Mikael: at 14:12:36
This has been an error on our end and we do apologize for that. But no worries, if you have opted for the pre-ordered game you will directly have the code.
I just got a second email from XBox Rewards that contained the code this time. I bet it is heading out to everyone for a second time now.