***SPOILERS*** ...After the end
Do Will and his significant other make it out alive? The cult seems to be (kind of) esoteric. Sure, the area they were in obviously had a *beep* of members, but you pretty much have to go to Mexico to be indoctrinated.
So if they make it out of the area, maybe they can survive? Or hell, they could just stay inside the house. If other houses are having their own murder/suicide parties, who's gonna screw with them? It's not like the acolytes are purging.
Maybe I misread the scene and they weren't in danger, they were just like "holy *beep* look at what's happening"