Nope. I know and think I understand MARSA... Although I think it is frequently misused. (From my understanding of how it is defined in the GP.)
I'm not military (I am retired military) but I fly contractor airplanes and I get offered MARSA frequently. We are not equipped/briefed or part of a group/formation that has each other's frequencies to participate in MARSA, although I hear many other contractors doing it. (And [personally] I think accepting MARSA with a UAV is crazy... but that's another subject.)
RBS only recently started being transmitted and I am curious about it. I don't see it in the GP or AIM.
ORTL
Gab