The survey is now closed.This notification was sent to users in January 2016, it said:
"ROBLOX would like to know more about you. At the end of the survey, you will be redirected to another page and be asked to input your user name. 25 users who have completed the survey will be randomly selected to win 1000 ROBUX - which will be added to the account name entered in the survey. Your user name will not be tied to your survey answers in any way.