Now we had this strange 180 degree turn in the logic. The original accusation was GPL in FGMEMBERS would violate license rights due to included non-GPL parts. Which was never the case because non-GPL planes are not in the regular FGMEMBERS. After I pointed this out, suddenly it is "it is possible that some license holder gave a permission to distribute parts of his work as GPL" ... which is a general statement and has nothing specific to do with FGMEMBERS and is also not a contradiction of what I said earlier. Any license holder who published works under other than GPL license can later also publish parts of this work under GPL and if he does so, a plane that only includes GPL licensed parts can be in FGMEMBERS. So ... FGMEMBERS has here no problem.
The only problem I found is, FGMEMBERS was definitively formed too late. There is some history from 1012 or before that had already been lost. I can't find any working Alouette III under JSB and Dave Culp's working AH1S under JSB seems also to be gone with the wind. The only version drifting around seems to crash FG. So ... since FGADDON, the one and only "official" plane collection allegedly never lost history (while FGMEMBERS didn't get some aircraft that were already completely lost before 2013) ... do you have those helicopters somewhere? There is also an R22 JSB somewhere, but it was on Gitorius and Gitorius closed (and the R22 under JSB was never on the website as far as I can see).