I would imagine they have a plan and reason behind it all. I imagine it was quite a few years in the original IL2 before return on investment was made etc. So I would wager a guess some of this funding is also coming from the team's own pockets.
But, if it does get off the ground, I wouldn't expect the pacific (or any other theater) they make to be free. I do agree that more money could have been had for different rewards etc, but I'm sure they have very good reason to charge what they do for the initial title. If this thing gets going, we could very well eventually have every WWII theater and a large majority of the WWII planes at DCS fidelity.
As far as QA with FM stuff, I'm sure that's one of the huge advantages with the Fighter Collection. I would wager a guess they will also be signing off on that aspect of the sim as well. I see this all as very good news for the future.