I was just wondering: how do marauders work, "under the hood"?
'Cos I had this particular planet where a couple of vampire claws were camping. Then every so often 1-4 marauders would attack (and be swiftly butchered by the Dyson Gatlings there, but that's irrelevant). This didn't happen to other planets with vampires camping, though.
So, just a theory: are certain planets earmarked as "marauder" planets, such that when so-and-so period elapses, a check is performed to deliver a number of marauders proportional to the number of hostile ships on it?