Okay after seeing the fifty million MegaFobs I can say two things about them. What makes them different from a metarush? It literal the metarush for defence. It main strat is to force a quick siege by aliens or never get caps. Now why would in any RP reason the CO not try to claim the colony? It is there main mission. Two it is not a fun thing for any party. No one wants to sit a FOB for 3 hours and be forced to do nothing. Aliens don't want to attack Fort Knox for no good reason.
What can add insult to injury is FORCING marines to stay in the MegaFob even if aliens are low on numbers. That really needs to end were if marines out number the aliens at either 8 or 10 to 1 they have to push rather then aliens be forced to suicide into cades.