I haven't watched the episode. Airium died? We just learned her name last week!
On the show Survivor, they typically have 18 or 20 people to start the game. Episodes are three day cycles with two challenges and then a vote out at the end. So there's a lot of daily interactions and things that happen with that many people and they often have to edit the show very tightly to give the viewer a sense of the week's events and why "Bill" got voted out.
What happened to Airium is called a Survivor Visibility Spike. You watch the show for a month and hear very little from Bill, sometimes forgetting he's on the show. Then all of a sudden, they show him gathering wood/lighting fires/doing well in challenges/making jokes...and it's a sure sign he's getting punted from the show that episode