Cult Colony: Averted initially, because sublight colonization was so ludicrously expensive that “cults” couldn’t possibly have afforded it.  Played straighter once the stargate plexus made it easier to get to new worlds, with a side-note that the failure rate – for which read death rate – of these is particularly high; planetary colonization requires a great deal of scientific acumen, technical skill, and mental flexibility, which are not common qualities attributed to things normally described as cults.  (Just look at how many pioneer colonies failed in Earth’s history – now add that you have an alien ecology to deal with and there’s a good chance that you can’t breathe the air.)

Much the same goes for cult habitats, to – well, a lesser extent on some factors, a greater one on others, but the net effect is much the same.  Most cultists aren’t good with sophisticated technical infrastructure.