Safeguards Carl succeeded in having turned off, which the returning volunteers came anyway despite losing.
Tipid frames the returnees' decision in terms of the protections: they had come to help fight their former captors, and "even when I managed to get the protections turned off, they still came." Carl is, again, overwhelmed with emotion at the realization.
The detail sharpens what the Crawler Army actually signed up for. Fifty thousand people re-entered the dungeon at level 60 with no gear under The Standard Merc Package, knowing the safeguards Carl had stripped away would not be there for them either. It is the strongest measure in the chapter of what they think the fight is worth.
Removed safeguards whose absence failed to deter any of the returning volunteers.