This casino promotion could be a disaster -- for the casino. It comes from Harrah's Rincon casino in San Diego, and the offer came in the mail today.

The offer is called "Take It or Leave It" and it's in effect every Sunday in November.

The post card from the casino says to swipe your Total Rewards card to see your guaranteed prize. "Then, it's decision time," the mailer says, "TAKE your guaranteed prize or LEAVE IT for a chance to DOUBLE IT!"

My mailer says I am guaranteed $200 or I can risk it. The question is -- is this a double or nothing promotion? Or is there the potential for some other "prize" should I not get the "double up"?

There have been other promotions before where you are offered a guaranteed prize and can take a chance to receive a smaller or larger prize -- but you are assured of getting "something."

But when you say "take it or leave it" it gives the impression that you can get your guaranteed prize not only wiped out, but you would not get any other kind of prize.

Details are available at the Total Rewards desk so I am certainly going to ask before I swipe my card for this promotion. Sure, I'd risk $200 of free play for a chance at $400 of free play if I was also assured that as a "consolation prize" I would get $100 or $150.

But if I risked $200 of free play and after my "swipe" I found out I got "zero" I would be a very unhappy customer who just might storm out of the casino and never return.