User blog comment:Legionwrex/How Dead Space is now copying Mass Effect./@comment-4121017-20130208190653/@comment-1786741-20130208211457

They stopped ONE. ONE brethren moon. That was the only brethren moon in that area of the galaxy. They both have different reasons for making more of themselves. The brethren moon harvest because they are compelled to do so. They literally harvest any organic material they can come across so they can "procreate." Reapers on the other hands do this because of some contrived cycle so organics don't create synthetics. They aren't creating more of themselves JUST for that reason, they're doing it for their main function of stemming the synthetic vs. organic conflict. The sleep thing though is pretty much in all Cthulhu-like monstrosities so that's pretty much inconsequential.