Is Email Sampling Over?

Matt Dusig proposes in his article that email sampling is nearing it's end. He says email is like radio and is a declining medium that will slowly fade. Even though radio is still used my many people, it's not even close to what it used to be. Dusig believes the future of sampling is through directly online, through the pop up prompts that ask you to take a survey (I've noticed these especially on Best Buy and Eastbay.com), and through mobile technologies. Even though I think I would respond to an email survey, I definitely agree with Dusig that it is a dying sampling technique and that the future is through online and mobile technologies.