@T.H. Yes, that sounds like a fun idea! They start out mostly vanilla as they did, but decide not to give up, actively making the scene more kinky. The jailers become increasingly creative, many of the deals throwing the girls further back. After some hours, the jailers announce that they're closing up and have to let them go. But they offer an option to continue later: If they agree to keep wearing the chastity belts, they can come back in a week/some days to try a new room. On top of that they get another offer: To finance the kinky endeavor, they can start live-streaming the session. As advertisement, they can publish clips from the now finished session. Some kinky, consensual fun.
This could turn into a fun series about kinkfluencers that make a living live-streaming their escape room attempts while being belted the rest of the time. In between sessions they could post clips of their training for the next session. Perhaps they even have sponsoring from a chastity belt manufacturer.
This idea just exploded in my head and I had to share!