Because with a horde. You almost cant loose. Your odds increase significantly that you will not only take the base...
In the off hours arena on Sunday alone, I watched
repeated waves of Bish missions going into a few Knit bases. As each mission is posted there are calls of "need more, need more". Mission rolls ... watch out of corner of my eye ... in awhile more green dots up in congo line from mission launch base, soon ... "need more goons" ... finally planner announces "it's a bust ... MISSION UP".
New target in sight, the cheerleaders and pom pom swirlers spam country channel ... again.
Many attempts, none successful. They even lost A27 as one of their launch bases after an un-successful attempt. Well, they might have gotten one eventually if memory serves, A45 I think ...
There are times when depending who is on and participating, the thing works. There are a
lot of times when it flat out doesn't and a horde does not guarantee much other than the noise level escalating from those on both sides of the fence. ;-)