Maybe this kind of surveys are part of scam, I got a seaman friend that had an experience of his family being called by someone telling that something bad happened to him (but nothing actually happened) and told all info's the caller have about him and his house. so his family panic and did what the caller tell them to do (inserting money to a bank account, selling all stuff that can produce instant cash) by the way his family tried to contact him at first but somehow the phone is out of reach. So they got scammed, using this info's