OpenFalcon only works on the original 1998 game Falcon 4 which is no longer sold.
So from an economical standpoint Atari (or whoever has the brand today) don't loose any money because of it. Nonetheless the mod is pretty illegal (as are all the mods of the old Falcon 4), and even on very liberal forums such as Frugalworld it is frowned upon (if you give an explicit link to download it).
The real difference between Falcon and DW is that after an almost 10 year limbo, people actually continued and improved development on Falcon 4 with the official Falcon 4 Allied Force release.
Release that for all intents and purposes was done to "gauge" the interest in future high fidelity sims (with dynamic campaigns, something that ED has never been able to deliver but thats another can of worms...). The sales were pretty interesting that an F-18 sim built upon the Falcon 4 code is in the making. Dynamic Campaign and Naval Operations in one sim ? Hell yeah.
SCS has no interest in continuing development of the "game version", and is even less willing (I suppose) to licence the code to someone else because of "classified aspects".
So in our case we are sitting between the hammer and the anvil. And it hurts.
