Yeah, I read on the tooltip that they give you 25 or 45 M/C or whatever, but that's obviously just a trifle. And if you do capture a planet with one, it'll cause the AI to hit that planet harder, and if you lose the settlement you go up, what was it, 80 AIP?
I've been avoiding planets with these like the plague. Are they just an option to make things more colorful/difficult, or did I miss something?