Blackjack free play coupon at Silver Nugget

What does the coupon that says 20 free blackjack play. Is that a coupon for a bet of 2o dollars or what?

The front of coupon says: Present this coupon, along with your Silver Rewards card, at any blackjack table to receive an additional $20 in promotional chips when you buy-in for $20 or more. See reverse for details.

Back of coupons says: Limit one offer per person, per day. Must enroll in Silver Rewards Club, or be a current member. Promotional chips must be bet and cannot be redeemed for cash. Winning bets made with promotional chips will be paid with regular negotiable chips. Must be 21 years of age or older. No cash value. Management reserves the right to modify, change or cancel this offer at any time without prior notice. Offer expires 12/30/08.

Do these 'promotional' chips remain in play after a winning hand ... like the non-negotiable chips used from the Sahara 50/40 ?

You lost me....whaich casino is this for ?
Expiring in 08 ?

Good question Buddha---for example, the Hilton used to run a coupon that gave you a free $10 bet, but they took the chip, win or lose. If you won, you got the $10 win, but could not bet the NValue chip again.

I would assume so, but I'm not 100% sure.

We're talking about the Silver Nugget and/or the Opera House. When I signed up a few years ago at SN, I got $20 in promo chips that they took whether I won or lost. I look forward to reading folks experience with these. I skipped visiting the Opera House, perhaps unfairly, just based on outward appearances and location.