Because they are cheating.
Why the game developers are not putting a stop to it is the real question. By allowing the rampant growth of the cheater group the developers are effectively killing off the players who pay to play.
a sure way to know you are up against cheaters is to look at their population - which many times will be quite low - sub 500k — and then look at their average war score and spells used. The war score will be huge and the spells used will almost always be a super high level magnetism spell. I have played for several years and my magnetism spell is only level 5 — cheaters will have magnetism spells as high as level 20 which is just impossible with populations as low as 40k.
