The FOX program is a support program that has to be renewed periodically. Products downloaded within this period of course can still be used after the support period has expired.
When you participate in the program you will get:
Please note that for each developer that you want to give access to the private forums and newsgroups you need to buy a separate license!
If you need multiple licenses you may also want to consider to become a corporate sponsor.
See https://www.xsharp.eu/store/corporate-sponsorship for more information about the corporate sponsor program