Here is the fine print:
Cruise Privileges Program valid for new bookings of voyages of 5 nights/6 days or longer made through American Express Travel for sailings completed by 12/31/11. May not be combined with group promotions or offers, including American Express Mariner Club, unless otherwise indicated. Blackout dates, category and fare restrictions may apply. U.S. Platinum Card member must travel on itinerary booked. Shipboard credit and provider amenity based on double occupancy. Shipboard credit cannot be used in the casino or for payment of gratuities, is non-transferable, cannot be redeemed for cash or credit and cannot be combined with other shipboard credit offers. Limit one shipboard credit and provider amenity per stateroom. Three-stateroom limit per Card member, per sailing. Must be 21 years of age or older to consume alcohol. Please drink responsibly. Payment must be made with an American Express Card in the Platinum Card member's name. To receive Cruise Privileges Program benefits, travel agencies must call American Express Agency Services Desk: 800-428-0250, option #2. Participating program providers and benefits are subject to change without notice. Ships' registries: Azamara Cruises: Malta; Celebrity Cruises: Malta; Crystal Cruises: Bahamas; Cunard Line: Great Britain; Holland America Line: Netherlands & Bahamas; Paul Gauguin Cruises: Bahamas; Princess Cruises: Bermuda; Regent Seven Seas Cruises: Bahamas, Bermuda; Seabourn Cruise Line: Bahamas; Silversea Cruises: Bahamas; Uniworld: France & Switzerland; Windstar Cruises: Bahamas. American Express Travel Related Services Company, Inc. acts solely as sales agent for travel suppliers and is not responsible for the actions or inactions of such suppliers. We want you to be aware that certain suppliers pay us commissions and other incentives, and may also provide incentives to our travel counselors. CST#1022318-10, ML#1192, Washington UBI#600-469-694, TA#002 - Registered Iowa Travel Agency, NV#2001-0126. ©2010 American Express Travel Related Services Company, Inc. All Rights Reserved