Well there is nothing they can do with the type of information they ask, those information are not too personal in my opinion. How many are you in your family, how much does your household earn annually, those questions can do no harm.We all want to make money, due to this natural human instincts of survival we get to engage in all manner of stuff to make money. Such stuffs including filling out surveys online. I am in doubt if it is safe to supply my personal information.