I've come to learn quite a bit about email marketing recently, but there are a few things that I don't get, One is, say if you are in the weight loss niche, and you're building up a list of women needing to lose weight, you only have a limited amount of products to promote and you only have a limited amount of information women looking to lose weight need to know. So how are you supposed to email them forever? Are you supposed to keep mailing them forever? Because there's only so much people need to know and useful products they need to buy right? So how does it work? Is each person on your list only supposed to last a certain amount of time?