an ad costs up to 30k for 30 seconds, they have 4 breaks and at least 6 ads per break thats up to £720k per show, that's plenty for costs and prizes. They actually need the punters to win sometimes or people turn off. So it's win/win for ITV, no fiddle necessary.
Postman44. Some of the questions the Chaser gets in the final are ridiculously easy. And the Beast is such a bad loser. I think they let the celebs win sometimes.