I’ve been in touch with the creators behind the Worlds in Peril Kickstarter campaign.
A few messages back and forth, and then:
Talked to the team, and yes the text will be CC-BY. I hope that is something you can get behind. :D
I’ve let them know they should list it on the Creative Commons Kickstarter listing, and also make an update/note on the main page that the text will be CC-BY.
Also, to assist in showing the support that us free gamers can muster, I suggest using the the “commons” as a reference for their analytics. So share the link: https://www.kickstarter.com/projects/63676387/worlds-in-peril?ref=commons ^_^