While I’m all excited about finding exoplanets and all someone needs to remind folks that this is speculative theorizing through and through.
At some point astronomers need to be reminded to actually observe things before reaching conclusions even if that means you cannot reach a conclusion for another a good while.
Next we’ll see speculative theorizing as to the type of architecture the theoretical inhabitants of these exoplanets might have used recently.
stop! you're just giving them ideas...I can hear the grant application papers rustling already...
This is really just a matter of building a model using math and physics, not unlike the (classical) black hole concept.