This is an official WGL celebratory giveaway, for which you need to complete social actions to get tickets. Don’t cry foul please, cause it is official and endorsed by WarGaming through WGL, but as it’s free stuff it’s quite normal that they look for your data and whatnot.
There is a draw, and winners will receive 500 gold and 1-day Premium bonus codes by e-mail. So make sure you know what e-mail you use for Facebook if you decide to register with FB.
Winners will be selected randomly on April 25th 12pm PST and again on April 26th 4pm PST. and then emailed a code that contains 500 gold and 1 day of premium. These codes are limit one per account and limited to North American and European accounts. These codes expire on May 1st.