Also, what if Questionable Content is in the same Universe as Madoka Magica? Here me out on this one: Emily figures out a way to defeat Entropy, but the universe is already too close to heat death for her idea to work. So she invented a time machine to go back in time so she could make a difference. However, she screwed up on some calc, and accidentally traveled spacially in addition to temporally. The incubators discover humanity by meeting her. She gives them the method to prevent the heat death of the universe, since they have the resources to make the plan work, and trades the technology for a Banana Smoothie. They promptly deploy the Magical Girl system. It's absurd enough to be an Emily idea.
Emily is responsible for the setup of Madoka Magica, and QC is in the same universe.