Why would you not use it? You can annoy your user with it and not have the concern of being blocked by some stupid popup blocker? Do you want to take a survey?

Why would you not use it? You can annoy your user with it and not have the concern of being blocked by some stupid popup blocker? Do you want to take a survey? Sign up for my newsletter? I know it's your first time on the site and you didn't even get to the content yet but SERIOUSLY I NEED YOUR EMAIL ADDRESS.