I just gave up, ALL missions available to me at Malcorum Prime are of the type "Siege", whereas ALL MISSION OF TYPE "SIEGE" give only 20% of the experience AND fate they should.
Above that, the "event" is a display of utmost laziness and inability of the devs.
I fully expect they give the "grand reward", being an "incredibly awesome emote" to EVERYONE that participated, at all!
Because I was just told that there IS NO WAY TO REFUND experience and fate lost due to this bullshit,
and I am not going to waste anymore time with this charade of an "event".