I can understand why, it's clearly possible. Just look at the galaxies moving away from us faster than the speed of light. Anything is possible, if you work out the magic.

But, see, that's the problem. I can't look at them...

Sure, the universe as a whole does not obey conservation of energy. That does not make it particularly useful for a generator.

It makes sense if you consider our obsevable universe as the inside of a huge black hole.