Why do I have to pay to send a message?
The postal services in middle-earth times were not what they are today you know! If you wanted to have a message delivered then someone had to be paid to go and deliver it for you, that is if you don't go deliver it yourself obviously. However, lets not forget that travelling in quite often dark and unprotected areas is an undesirable business and generally requires some kind of incentive.
In Planet-Tolkien messangers are paid using Mithril which you receive on your first unqiue visit of each day to Planet-Tolkien as well as other methods found in our help files.