America's always been about giving away shed loads of money in their gameshows and lotteries, although when you consider they effectively have to give a substantial chunk of it away (something like 40%?) to the IRS and then maybe a smaller chunk to their local state, so the winning doesn't look as generous as it does on paper/screen, although last time I looked into this it was possible to mitigate as an annual annuity, something like 30 payments over 29 years in the case of Powerball which would reduce the tax liability and allow you to keep more of your winnings, which would be reduced in value over 29 years anyway by inflation so...
Indeed, I believe that taxes have to paid up front for prizes on shows, so some contestants on The Price Is Right refuse prizes because of this - though refusal is rarely the case for the Showcase Showdown.
I think Strike It Rich did have more ridiculous prizes, but from what I heard from people who've been on the show, they never got the prizes anyway, just a cash equivalent.
The credits for Strike It Rich mention Red Letter Days (known for such wacky experiences) - presumably even if the cash equivalent was given, they could approach them and take such an experience.