Building Email Lists

The points one building email lists were very on point. I think they also highlight how critical an ever-expanding email list is to online campaigning. The power to reach so many people with just a touch of a button is invaluable. I think when dealing with campaigns it should go even further and at this point, every contact the campaign has with voters should include an attempt to get the voter to sign up for to the email list. It needs to be both online and offline, at rallies, at fundraisers, door-to-door canvassing, telephone canvassing, even encouragement in direct mail. I have also noticed though, that many campaigns are now using splash pages on their websites so when you first enter you are prompted to sign up for email updates, I am curious to how effective that is, does it get more people to subscribe or does it turn people off from it by being so straight forward?