[Jon]

There's nothing in the egood module that prevents people from posting a link on websites, message forums, etc. for download before the link expires. When I sold egoods (audio) I liked to watch my file not found errors and see who was distributing, usually a warning smartened them up and if not I banned them from the store. You could have some checking custom coded into the module to limit the number of downloads before they have to contact you for a new link.