well what i think those sro files where been used by more than 1 game company , cuz the way of those files develop can let u make a full new game with new regions ,,
as for example , u can change the (Data) in the data folder which the sr gameserver read(load) the data which like data.pk2 to prevent something like wall hack or speed hack ,
So i think joymax and it's developers just develop the graphic (game client) and add some projects to agent to protect the game client from edit or use legend programs like bots or loader ,,
Anyway Joymax got the source code of those files but can't write any copy right on them .!