While the rest of the world have developed many barriers and protections to keep their e-mail accounts spam-free, there are also those that subscribe to mails that promotes their products, services and their site. This is mainly because these subscribes wants to know more about what these sites are offering and can be beneficial for them. They expect to get be kept posted on what they are interested in and what are new in the market or field they have chosen.

An opt-in list can be quite crucial to any site or internet based company. Even for a small venture such as a niche profit site an opt-in list can make a world of difference and also add some extra income for your pocket. Rarely would you see an e-commerce site, big or small, that is without an opt-in list.