Beyond the Edge producers had a contingency plan in case its celebrity castaways quit

Variety

CBS and Beyond the Edge production company Renegade -- which also produces Naked and Afraid -- wanted to make it clear that its celebrity castaway series isn't Celebrity Survivor or I'm a Celebrity ... Get Me Out of Here, particularly since there are no eliminations. But CBS was worried celebrities would quit. “There’s so many places for celebrities to do things,” said Mitch Graham, CBS' alternative series vice president. “What was tough about this one was honestly finding celebrities who would be willing to do it. Because it was real out there. When we first started casting people, you immediately knew whether or not someone was in it for the right reasons. And the charitable piece, I think that was a really unique piece of the format. They didn’t have to stay there. They could leave at any moment, but they were all there fighting, sleeping in the rain, not eating much, trying to win as much money as they could for the charity.” 

ALSO:

• Beyond the Edge producers were surprised when one celeb quit after two days: "You just never know," says executive producer David Garfinkel. "Survival is a weird thing. Doing Naked and Afraid after all these years, we found that women are actually stronger than men in survival. I think it’s because they give birth. That’s my take on it! It’s not a physical thing. It becomes a mental thing. You just don’t know who’s going to have the mental capacity to survive this. Just because you may physically be the strongest doesn’t mean you are going to last in this kind of challenge."
• Beyond the Edge will make viewers appreciate the quality of Survivor: "The greatest compliment I can offer to Beyond the Edge is that watching its first two episodes made me extremely grateful for Survivor, and how extraordinarily well-produced it is," says Andy Dehnart. "Survivor’s producers may make decisions I don’t like, to say nothing of their colossal f*ck-ups, but the overall quality level is so much better."