It's not difficult to arrange either. Adding these features can easily make a free website a valuable resource for customer data. There are widgets that can be dropped into pages to allow subscribers and the resulting email lists to be compiled. The easy bit now is to send them emails that will gradually build up their trust in you. The plan is not to sell something every time you mail them, but to keep building up your profile in their mind. They will start to buy, and then if the email campaign is done right they will return to buy again. At that point you can sell to them consistently through these email messages. There's no doubt that building these online customer relationships up is the key to very cost effective, predictable and long-term sales.