I watch Pointless almost every day. It is such a smart, fantastic show. Immense playalong value. And when the jackpot resets, they're playing for a thousand pounds. Split between two people!
It's not ever a life-changing sum of money up for grabs, but the game is so good and fun, and if the contestants do win, they get a nice holiday out of it. If not, they get a cool trophy.
There's not an equivalent format for the USA at all, where the top prize is never more than something to pay for a holiday or trip.
I wish GSN would take a risk on such a show. I don't know if the exact format of Pointless would translate over here, but look at Pyramid's ratings. Solid game, not a metric ton of cash being given away.