Under the Skywest EBA, only skywest pilots can fly skywest aircraft so your point only works on the virgin side of the fence Kelpie!
No that's to do with the tail. These guys can work for skywest as pilots just as anyone else can.
The kicker with that is they cannot outsource skywest flights to another AOC.
I would hazard a guess that when the EBA comes up for renewal there won't be a scope clause in there.......