How does it work with returning visitors on paid sites?

A visitor who downloads the access software automatically installs a desktop plugin. When a visitor later clicks on the desktop plugin and connects to the pay server, these minutes are also added to your statistics. You can recognise these minutes in your statistics because it says ?d-? in front of the site (i.e. d-virtualwonder). Therefore these minutes were made by a visitor that was referred by you at an earlier stage.