Didn't they have
Big brother: the battle as the fifth? Where they had to do these weird quests now and then? Indeed, it didn't really add much to it.
I did watch the show 'The bus', though which came after and was a variation on BB (instead of in a house, they were on a bus

). There was this guy called Koen, if I remember correctly who was quite nuts... I remember him screaming at this other guy, with his face right in front of him saying "I'm the only ******* on the bus!!". lol Some people on those shows had real issues. But I wouldn't be surprised if that was why they were selected for the shows.