Spinwing,
No they certainly wasn't asked to leave, I know that for sure. Three of them are Co-pilots and one Captain.
The Co's have been offered a fair bit more financially than they make at GHC (Gulf Helicopter Company, MTLAME) so off they wander to FAS.
I'm not in the know as far was what contracts they have been offered but money is certainly the incentive as far as I can tell.
As always time will tell although personally I'm not sure the grass is greener maybe a bit more like the dust is dustier!!