The survey was a decoy. By taking the survey, you got a screen that asked if you wanted to allow the survey to have access to your profile. If you said yes, it

The survey was a decoy. By taking the survey, you got a screen that asked if you wanted to allow the survey to have access to your profile. If you said yes, it got all of your data from your facebook account, including all of the data on your friends that your account has access to. The survey itself was basically a trojan horse and irrelevant.