That one phrase changed everything. The Anomaly was closed. It was simply gone with no sign of reopening, and with it went this fortified planet's entire reason for existence.
Sure, they could argue that there was a chance it would reappear since none of them understood how it had vanished, but that would only buy them so much time before the government would have serious questions about the situation and what they were going to be doing in the future.
The Hunters were much less concerned. They had signed up to guard the entrance to the Anomaly and make sure that nothing came through it to threaten the Alliance. They had done that job perfectly, and now that there was no entrance, they considered their contract fulfilled in its entirety.