There is no point. It only happens when someone doesn't know better or is wrecking a team. Today I told a relative n00b that he wasn't clearing cap space, except for 327k, and he said "I know." So, out of curiousity, I asked "Then why are you doing it?" He kinda went off but the gist of it was "YOU RUN YOUR TEAM AND I'LL RUN MINE!!!"
So, from that, I gather he had no real reason. I can't think of one either.