Most surveys would not even request for one's personal information.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.
In a case where they do, I do not think it is risky or unsafe.
There are other social platforms that have our personal data exposed, and still we are safe.