Offer may be combined with other Bonus Offers. (airmiles.ca)
Think about it: you can earn as many as 2 - 5 extra points per dollar by using your IHG credit card, then the 5 - 10 from IHG, and possibly more for other bonus offers. (upgradedpoints.com)
Here's how it works: From today (November 9) through December 23, you'll earn a mystery bonus of up to 50 % when you buy or gift Alaska miles (note that you may receive other bonus offers, too). (thepointsguy.com)