I could be wrong, but I don't see why these would not be eligible rates. Here's a former T&C from one of the promotions (from a Sheraton website not an Alibaba website).
- Offer is subject to availability at the time of reservation.
- A limited number of rooms may be available at these rates.
- Blackout dates and other restrictions may apply.
- Offer not applicable to groups.
- Not to be combined with other offers or promotions and subject to change.
- Not responsible for omissions or typographical errors.
- Void where prohibited by law.
- Starwood reserves the right to discontinue this offer at any time.
- Starpoints, SPG, Starwood Preferred Guest, Sheraton, Four Points, W, Aloft, Le Meridien, The Luxury Collection, Element, Westin, St. Regis and their respective logos are the trademarks of Starwood Hotels & Resorts Worldwide, Inc., or its affiliates.
This is, however, an official Starwood portal on the TMall portal. The fact that there are multiple Starwood-hosted websites with the information says all you need to know about the legitimacy of the portal. Here's the link from one of the Starwood hotel websites:
http://deals.sheraton.com/Sheraton-C...language=en_US