I bet you had ships like origami suicidecraft, knat not good or something like that...
Why those ships decrease event power/reward/xp?
After spending 60 turns on 3bil event it droped to 300mil, it happens frequently.
Event power: 6,146,308,765 fleet power
☺(#11502) encountered the Ancient Commander, engaging 474.297.071 fleet power.
again
Engaged Units
Fleet Name # of Units Attack Defence Hitpoints
Custom Ship 28 3 2306 6415295 108002 3767656
Borg Cube 1 43015 135940 888 469480
Knat crap 2 200096 717318 21180 495000
Forum software filtered ship name
it should be knat c*ap