Curiosity drives people online. When online, people usually want to know something. They are driven to websites by questions, and they will keep going until they find answers.
There are levels when it comes to customers. From customers that try your services once and complain several times more, to those that pretty much have you as a basic necessity. You know it, but how about your loyal customers? It's only right to make them feel special since you make most out of these customers.