Unfortunately, this is rather standard for Trickster. We don't have a large dev community like Ragnarok Online does, so things are bound to be private. The motive is solely monetary for the large servers.
If it makes you feel any better, all of my tools (excluding my crappy NRI creator and patch list maker) are open source on Github already. I haven't done much work on Trickster recently, but most of what I do becomes open source.