When I checked my email linked to my Turbine account, they wanted to know what I thought about DDO, and gave me 500 points for answering.
Apparently, it's random but I wanted to tell everyone to check.
These are screenshots of the letter and confirmation when I got my points.
Please, I am not trying to scam anyone, just letting everyone know to check their mail.
BOTH were from Turbine, but the link for their questions was to an external site. I was not asked to give any real personal information, or buy anything or something like that. They did not ask for my Turbine account information.

http://tinypic.com/view.php?pic=11j918y&s=5
http://tinypic.com/view.php?pic=2z8yx3p&s=5