Seeking out surveys is probably better than the survey seeking you. It might not be such a good idea to take a survey that was sent to your email address. Especially if you didn't sign up for it.
Sometimes hackers might send viruses this way. These viruses might destroy your hard drive. Plus, they might also steal personal information you have stored on your computer. So be careful before you click. It's also a good idea to add safe-survey companies to your address book, so you know what is legit, and what is spam email.