After the banquet, Jacob locked himself in the Dark Room again, this time with no intention of coming out unless he created a new weapon or something like the attack of the Star Hackers happened again.
Moreover, the very next day, Jacob finally receives his compensation and rewards for killing the Star Hackers from both the Dark City and the Star Network. The Dark City really represented Jacob as his proxy to claim rewards from the Star Network for him. This was one of the biggest benefits of having an organization behind you.
He earned 1 billion ZC from the Star Network and an advanced unique rank defensive magic scroll, but no honorary badge; maybe it was because Jacob already had two, or it was because just those guys weren't enough to earn himself another honorary badge. Maybe if he took down the headquarters of the Star Hackers, he'd earn some pretty high rewards.