User blog comment:GrandMethuselah67/Lore Sheet: The Democratic Imperium of Neohumanity/@comment-4867780-20150925065819/@comment-26322734-20150928031302

Oh, the whole bigger-on-the inside thing is just another way of saying "pocket dimension". It's warping space within a relatively small area to expand the inside while keeping the outside the same size. It's the whole TARDIS concept from Doctor Who (if you watch that). So it's just warping space.

Exotic matter is just matter that follows different rules from regular matter. In this case, reverse-entropy exotic matter would start out with no energy and simply keep gaining energy until it turned into quark-gluon plasma (superhot atomic material that was generated seconds after the big bang). When I say they siphon energy from the planets, I don't mean they use fossil fuels or anything. That's actually been outlawed since 2060. I mean they just take a bit of the planet's heat and wind energy (hyper-advanced geothermal power plants that convert heat energy into electricity, wind turbines, and hydro-electric power dams created in massive man-made bodies of water). As for stars, they can fuse for a long time, and the amount of energy they generate isn't to be underestimated, especially the ones created by the D.I.N's stellar engines from ambient space dust. For example, most of our sun's sunlight goes into other directions as opposed to Earth, and we get a very small fraction of it. Yet the planet can still sustain life. Metrospheres gain at least more than 182 yottajoules per second from stars, especially including the many larger than our own sun. Metrosphere objects that siphon power from black holes actually siphon Hawking radiation, or the particles that are metaphorically "vomited out" from spinning black holes. That and, well, kinetic force.

Another source of power would be Neutron Stars, who are massively hotter than our sun (1 million kelvin compared to our humble 5,800 kelvin sun). They also generate massive kinetic force due to their spin (they spin so quickly that their shape becomes eliptical) and even more energy due to their strong electromagnetic field (8 trillion times that of Earth's). By the way, the D.I.N. can create these. Casually.

Even more still would be, as you said, siphoning power from other dimensions. So yeah, they're good for energy, at least for a few centuries. If they ever run into any other energy crisis, they'll come up with more solutions. OZMAGNUMOPUS is definitely intelligent enough to do so.