I'm not sure I understand. If you purchase through the Microsoft Store, you don't have to buy additional licenses. If you purchase through my FastSpring store, then you get a new license key and a link to a .appinstaller file. That is a relatively new approach to installers that Microsoft added with UWP, so saying it is outdated makes no sense. Saying I don't sell "real licenses" is both condescending and rude, as well as insinuating that I'm unable to handle things myself. I appreciate you trying to provide suggestions on the forums, but tone really matters.
Mike
Mike