I think I'll watch to the end of this series and won't bother in the future. It's so obviously contrived now that it's boring.
They all blatantly know what's going on and have been told not to say anything.
I wonder if the couples like Ning and Mark know they aren't going to last but have agreed to stick it out for the money. Not that there can be much in it if they've got to pay their own bills etc from the money they get for staying.