Bonus Starpoints on stays from January 11th to April 30th, 2016 :

Double Starpoints® on stays of two or more nights at any Starwood hotel or resort worldwide.
plus
250 Starpoints per night at hotels and resorts in popular destinations, including New York, Rio, Hong Kong and Dubai.

Plus 2,500 points for 15 nights during the promo period, plus an additional 7,500 points (for 10,000 total) for reaching 25 total nights (10 more nights beyond the first 15 nights) during the promo period.

Registration required :
https://www.spgpromos.com/taketwo/?l...ETWO_PROMOTION

Every property is participating in SPG Take Two. Only the listed properties are offering 250 additional Starpoints per night :
https://www.spgpromos.com/taketwo/?a...ETWO_PROMOTION

Note that the 'listed properties' can only be found in these locations :
North America Boston, Chicago, Hawaii, Las Vegas, New Jersey, New York, San Diego
Europe/Africa/Middle East Egypt, Germany, Spain, Turkey, UAE
Asia Pacific Beijing, Hong Kong, Japan, Macau, Maldives, Shanghai, Singapore
Central South America Brazil, Caribbean, Puerto Rico, Peru


FAQs :
https://www.spgpromos.com/taketwo/?a...language=en_US

When can I register for the promotion?
SPG Members can register starting December 15, 2015, through 11:59 p.m. Eastern Time (ET), April 10, 2016; this is called the "Promotion Period."

Can anyone register for this promotion?
Any Member can register at spg.com/taketwo. A nonmember can join the SPG program and register simultaneously, also at spg.com/taketwo.

What are the dates during which I can earn bonus Starpoints?
Each registered SPG Member can earn bonus Starpoints for eligible paid stays from January 11, 2016, through April 30, 2016.

Will eligible stays or nights prior to registration count toward my earning?
Yes, as long as the member registers by April 10, 2016, any eligible paid stay from January 11, 2016, through April 30, 2016, will count toward earning.

How do I earn double Starpoints?
A registered member will earn double Starpoints if the eligible stay is two or more nights at any SPG-participating Starwood hotel or resort during the promotion period. The bonus may be earned an unlimited number of times.

How do I earn the bonus of 250 Starpoints?
Registered members who stay at least one eligible night at a hotel or resort participating in the SPG Take Two bonus promotion will earn 250 bonus Starpoints. The bonus may be earned an unlimited number of times during the Promotion Period.

Do I need to stay two or more nights to earn the 250 Starpoints?
No. Registered members do not need to stay two or more nights to earn the 250 Starpoints bonus. Registered members who stay at least one eligible night at a hotel or resort participating in the SPG Take Two bonus promotion will earn 250 bonus Starpoints. Click here to view the complete list of hotels and resorts participating in the bonus 250 Starpoints promotion.

At which Starwood hotels and resorts am I eligible to earn double and bonus Starpoints?
A member can earn double Starpoints at all of the over 1,200 SPG-participating Starwood hotels and resorts. A member can earn the bonus 250 Starpoints at a selection of Starwood hotels and resorts. Click here to view the complete list of hotels and resorts participating in the 250 bonus Starpoints promotion.
What qualifies as an eligible paid stay for the double Starpoints?
An eligible paid stay includes at least two nights at a participating SPG hotel or resort paying a qualifying rate that earns Starpoints as defined by the terms and conditions of the SPG program (spg.com/t&c).

What qualifies as an eligible paid night for the bonus 250 Starpoints?
An eligible paid night includes at least one night paying a qualifying rate at a select group of Starwood hotels and resorts during the Promotion Period. Click here to view the complete list of hotels and resorts participating in the bonus 250 Starpoints promotion.

Can I book through a third party and earn bonus Starpoints?
Stays must be booked through any Starpoints-eligible channel, which includes a travel professional who books through those channels or the GDS. This is the only way to earn double Starpoints and get our best rates. Stays booked through prepaid, third-party channels — such as orbitz.com, expedia.com, travelocity.com, delta.com, etc. — are not eligible Rate Plans, so the member will not earn bonus Starpoints and will not qualify for the offer. A description of a Starpoints-eligible channel can be found at spg.com under the program terms and conditions, section 2.1.

How many Starpoints do I earn with double Starpoints?
With double Starpoints, a member will earn four (4) total Starpoints per eligible US$1 spent. Elite-level extra Starpoints earnings and other bonuses will not be doubled. Only the base two-Starpoints-per-dollar earnings are doubled. There is no limit on the number of total double bonus Starpoints a member can earn.

If part of my stay was reserved using a Free Night Award or SPG Cash & Points, will my stay qualify?
No. Stays booked with Free Night Awards or Cash & Points do not count as qualifying stays for this promotion. Even if part of the stay is reserved using an Award and part is paid, the member will not receive bonus Starpoints for any part of the stay.

If I check in before the Promotion Period begins, or check out after the Promotion Period ends, but some of my stay is in the Promotion Period, does my stay earn the bonus?
Yes. As long as one night of the stay is within the Promotion Period, bonus Starpoints will be earned on every night during the entire stay (even if part of the stay falls outside the Promotion Period).

When will double and bonus Starpoints post to my account?
Double and bonus Starpoints will post to the registered member's account within two to four weeks of each eligible paid stay posting. Please note the double Starpoints may post prior to the 250 Starpoints bonuses.

Will I earn stay and night credits toward elite status?
A member will earn stay and night credits as he or she normally does while earning Starpoints.

Can I take advantage of other bonus promotions at the same time?
Yes. However, each promotion earns bonuses independently of each other