#2 - Nov. 18, 2010, 10:19 p.m.
The email appears to be legit, Bûtters. We are sending certain players an email offering 7 free days of game time, but the account must be inactive. I show you have 2 World of Warcraft accounts attached to the Battle.net account, once if which is inactive, so it is this account that would have received the offer.
You do not have to click on anything in the email. Simply log into Battle.net Account Management, select the account that is inactive, and you should see the option to apply the 7 days there. :)