I believe that you receive reciprocal benefits on the metal you were hired to fly for. Since the Q only flies for UAL then it is acceptable that you only receive benefits on UAL. Same with Republic I believe they are US and Shuttle is UAL and DAL. I am not sure about the AA side.
Mesa is US and I thought only a few were UAL, I think only a handful of 700's still fly on that side.
Anyway for what its worth just jump-seat. Non-Reving with family and friends these days is a NIGHTMARE!