end of spoilers
So, what? Killing them all earns him 18,800 years, but mocking them is 20,000?
Incidentally, this definitely proves that Gin isn't dead. They'd either have shown him disappearing, or showed his dead body with a "He's Dead" sign.
...Given that they have people who can bring back the dead, and that someone weaker than him survived getting cut in half, he's definitely alive.