Do you use an AutoResponder?

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I just wondered if many My Lotters use an Autoresponder for their business? I use one. The reason I am asking is that I find it difficult to attract large numbers to sign up. I have made four capture pages, and that seems to attract some, but the interest dies out after it has been shown a few times. Is it that I dont advertise with my capture pages widely enough to get sign ups? Or is it that I just need to constantly change my capture pages? What ideas do you use to attract people to your autoresponder? How many sign ups do you have on your autoresponder? I have 62, but I would like 1000 or so.