The allegiance subverter has a damage rating in order to "damage" the crew, and thus subvert them. Eg, at long range, it has a value of 20kt. A crew quarters component has a value of 10kt. That gives the subverter a damned good shot at "killing" the crew of a ship with only one crew quarters component. OTOH, if a ship had 4 crew quarters, the subverter would need to convert 40kt of crew with a 20kt damage weapon, which gives the ship a much better chance of surviving the attack.
But I still don't understand why my subVersion mines did actual damage to the ship.
John