I have as many as 800 subscribers now, promoting a weight loss e-book (ClickBank) through email marketing. Method: Google Display Network, with 7-day email marketing Cost: USD 1 cent per click Demographic: All countries in the world (I'm getting a lot from 3rd world countries, but I still get US and Canada and all the good visitors too, although not the majority. Landing page: Squeeze page (collects their email and redirected to product salespage immediately after that) I know you guys will say my traffic source (3rd world countries) sucks. But, are there any ways I can optimize my email marketing? Those of you who have been making sales using this 1 cent PPC click, please help.